<?xml version="1.0" encoding="UTF-8" ?><xml>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1VWG</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>35.4</bfactor-bindingsite>
    <bfactor-ligand>71.7507</bfactor-ligand>
    <backbone-hbond>-0.87</backbone-hbond>
    <cathid>1vwgB00</cathid>
    <dssp-bindingsite>C=33 E=47 S=7 T=13</dssp-bindingsite>
    <dssp-ligand>C=50 S=25 T=25</dssp-ligand>
    <description>STREPTAVIDIN COMPLEXED WITH THE HEAD-TO-TAIL DISULFIDE-BONDED PEPTIDE DIMER OF CYCLO-AC-[CHPQGPPC]-NH2, PH 2.5</description>
    <foldx-energy>-3.59</foldx-energy>
    <ligand>P</ligand>
    <ligand-size>8</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1vwgb_</scop-id>
    <ss-bindingsite>47</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-2.74</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1SLE</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>31.467</bfactor-bindingsite>
    <bfactor-ligand>37.3576</bfactor-ligand>
    <backbone-hbond>0</backbone-hbond>
    <cathid>1sleB00</cathid>
    <dssp-bindingsite>C=27 E=36 T=36</dssp-bindingsite>
    <dssp-ligand>C=50 S=25 T=25</dssp-ligand>
    <description>STREPTAVIDIN, PH 5.0, BOUND TO CYCLIC PEPTIDE AC-CHPQGPPC-NH2</description>
    <foldx-energy>-4.56</foldx-energy>
    <ligand>M</ligand>
    <ligand-size>8</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1sleb_</scop-id>
    <ss-bindingsite>36</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-2.43</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1VWB</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>28.4467</bfactor-bindingsite>
    <bfactor-ligand>41.6056</bfactor-ligand>
    <backbone-hbond>-0.48</backbone-hbond>
    <cathid>1vwbB00</cathid>
    <dssp-bindingsite>C=14 E=50 S=7 T=29</dssp-bindingsite>
    <dssp-ligand>C=50 T=50</dssp-ligand>
    <description>STREPTAVIDIN-CYCLO-AC-[CHPQFC]-NH2, PH 11.8</description>
    <foldx-energy>-5.65</foldx-energy>
    <ligand>P</ligand>
    <ligand-size>6</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1vwbb_</scop-id>
    <ss-bindingsite>50</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-3.42</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1VWH</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>38.0223</bfactor-bindingsite>
    <bfactor-ligand>61.3995</bfactor-ligand>
    <backbone-hbond>-0.84</backbone-hbond>
    <cathid>1vwhB00</cathid>
    <dssp-bindingsite>C=33 E=40 G=7 S=7 T=13</dssp-bindingsite>
    <dssp-ligand>C=50 S=25 T=25</dssp-ligand>
    <description>STREPTAVIDIN COMPLEXED WITH THE HEAD-TO-TAIL DISULFIDE-BONDED PEPTIDE DIMER OF CYCLO-AC-[CHPQGPPC]-NH2, PH 3.5</description>
    <foldx-energy>-3.72</foldx-energy>
    <ligand>P</ligand>
    <ligand-size>8</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1vwhb_</scop-id>
    <ss-bindingsite>40</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-2.66</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1SLG</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>27.9765</bfactor-bindingsite>
    <bfactor-ligand>45.4387</bfactor-ligand>
    <backbone-hbond>-1.05</backbone-hbond>
    <cathid>1slgB00</cathid>
    <dssp-bindingsite>C=30 E=40 S=20 T=10</dssp-bindingsite>
    <dssp-ligand>C=67 S=33</dssp-ligand>
    <description>STREPTAVIDIN, PH 5.6, BOUND TO PEPTIDE FCHPQNT</description>
    <foldx-energy>-6.12</foldx-energy>
    <ligand>M</ligand>
    <ligand-size>6</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1slgb_</scop-id>
    <ss-bindingsite>40</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-3.47</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1VWC</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>42.118</bfactor-bindingsite>
    <bfactor-ligand>79.4799</bfactor-ligand>
    <backbone-hbond>-1.37</backbone-hbond>
    <cathid>1vwcB00</cathid>
    <dssp-bindingsite>C=8 E=50 S=8 T=33</dssp-bindingsite>
    <dssp-ligand>C=50 T=50</dssp-ligand>
    <description>STREPTAVIDIN-CYCLO-AC-[CHPQFC]-NH2, PH 2.0</description>
    <foldx-energy>-5.05</foldx-energy>
    <ligand>P</ligand>
    <ligand-size>6</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1vwcb_</scop-id>
    <ss-bindingsite>50</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-4.11</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1VWM</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>42.6143</bfactor-bindingsite>
    <bfactor-ligand>57.1201</bfactor-ligand>
    <backbone-hbond>-0.21</backbone-hbond>
    <cathid>1vwmB00</cathid>
    <dssp-bindingsite>C=21 E=50 S=7 T=21</dssp-bindingsite>
    <dssp-ligand>C=50 T=50</dssp-ligand>
    <description>STREPTAVIDIN-CYCLO-AC-[CHPQFC]-NH2, PH 4.2</description>
    <foldx-energy>-3.08</foldx-energy>
    <ligand>P</ligand>
    <ligand-size>6</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1vwmb_</scop-id>
    <ss-bindingsite>50</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-2.98</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1RST</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>23.5812</bfactor-bindingsite>
    <bfactor-ligand>33.1629</bfactor-ligand>
    <backbone-hbond>-0.7</backbone-hbond>
    <cathid>1rstB00</cathid>
    <dssp-bindingsite>C=24 E=41 G=18 S=6 T=12</dssp-bindingsite>
    <dssp-ligand>C=56 G=33 T=11</dssp-ligand>
    <description>COMPLEX BETWEEN STREPTAVIDIN AND THE STREP-TAG PEPTIDE</description>
    <foldx-energy>-6.48</foldx-energy>
    <ligand>P</ligand>
    <ligand-size>9</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1rstb_</scop-id>
    <ss-bindingsite>41</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-2.67</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1VWD</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>30.3562</bfactor-bindingsite>
    <bfactor-ligand>40.4691</bfactor-ligand>
    <backbone-hbond>-0.97</backbone-hbond>
    <cathid>1vwdB00</cathid>
    <dssp-bindingsite>C=8 E=50 S=8 T=33</dssp-bindingsite>
    <dssp-ligand>C=50 T=50</dssp-ligand>
    <description>STREPTAVIDIN-CYCLO-AC-[CHPQFC]-NH2, PH 3.0</description>
    <foldx-energy>-5.21</foldx-energy>
    <ligand>P</ligand>
    <ligand-size>6</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1vwdb_</scop-id>
    <ss-bindingsite>50</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-3.75</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1STR</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>33.7373</bfactor-bindingsite>
    <bfactor-ligand>55.4827</bfactor-ligand>
    <backbone-hbond>-1.84</backbone-hbond>
    <cathid>1strB00</cathid>
    <dssp-bindingsite>C=36 E=36 T=27</dssp-bindingsite>
    <dssp-ligand>C=67 T=33</dssp-ligand>
    <description>STREPTAVIDIN DIMERIZED BY DISULFIDE-BONDED PEPTIDE AC-CHPQNT-NH2 DIMER</description>
    <foldx-energy>-6.1</foldx-energy>
    <ligand>M</ligand>
    <ligand-size>6</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1strb_</scop-id>
    <ss-bindingsite>36</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-4.73</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1VWN</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>34.0162</bfactor-bindingsite>
    <bfactor-ligand>52.4478</bfactor-ligand>
    <backbone-hbond>-0.79</backbone-hbond>
    <cathid>1vwnB00</cathid>
    <dssp-bindingsite>C=21 E=50 S=7 T=21</dssp-bindingsite>
    <dssp-ligand>C=50 T=50</dssp-ligand>
    <description>STREPTAVIDIN-CYCLO-AC-[CHPQFC]-NH2, PH 4.8</description>
    <foldx-energy>-3.92</foldx-energy>
    <ligand>P</ligand>
    <ligand-size>6</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1vwnb_</scop-id>
    <ss-bindingsite>50</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-3.33</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1KL3</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>32.0669</bfactor-bindingsite>
    <bfactor-ligand>36.0573</bfactor-ligand>
    <backbone-hbond>-0.12</backbone-hbond>
    <cathid>1kl3A00</cathid>
    <dssp-bindingsite>C=20 E=40 G=33 T=7</dssp-bindingsite>
    <dssp-ligand>C=50 G=50</dssp-ligand>
    <description>an engineered streptavidin with improved affinity for the strep-tag II peptide : SAm1-StrepII</description>
    <foldx-energy>-9.88</foldx-energy>
    <ligand>E</ligand>
    <ligand-size>6</ligand-size>
    <receptor>AD</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1kl3a_</scop-id>
    <ss-bindingsite>40</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-4.88</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1RSU</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>21.8323</bfactor-bindingsite>
    <bfactor-ligand>30.5502</bfactor-ligand>
    <backbone-hbond>-1.77</backbone-hbond>
    <cathid>1rsuB00</cathid>
    <dssp-bindingsite>C=27 E=41 G=18 S=5 T=9</dssp-bindingsite>
    <dssp-ligand>C=63 G=38</dssp-ligand>
    <description>COMPLEX BETWEEN STREPTAVIDIN AND THE STREP-TAG II PEPTIDE</description>
    <foldx-energy>1.89</foldx-energy>
    <ligand>P</ligand>
    <ligand-size>8</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1rsub_</scop-id>
    <ss-bindingsite>41</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-3.58</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1VWE</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>37.0224</bfactor-bindingsite>
    <bfactor-ligand>51.8906</bfactor-ligand>
    <backbone-hbond>-0.4</backbone-hbond>
    <cathid>1vweB00</cathid>
    <dssp-bindingsite>C=23 E=46 S=8 T=23</dssp-bindingsite>
    <dssp-ligand>C=50 T=50</dssp-ligand>
    <description>STREPTAVIDIN-CYCLO-AC-[CHPQFC]-NH2, PH 3.6</description>
    <foldx-energy>-3.68</foldx-energy>
    <ligand>P</ligand>
    <ligand-size>6</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1vweb_</scop-id>
    <ss-bindingsite>46</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-3.44</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1STS</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>29.9159</bfactor-bindingsite>
    <bfactor-ligand>51.1348</bfactor-ligand>
    <backbone-hbond>-1.06</backbone-hbond>
    <cathid>1stsB00</cathid>
    <dssp-bindingsite>C=30 E=40 S=20 T=10</dssp-bindingsite>
    <dssp-ligand>C=67 S=33</dssp-ligand>
    <description>STREPTAVIDIN DIMERIZED BY DISULFIDE-BONDED PEPTIDE FCHPQNT-NH2 DIMER</description>
    <foldx-energy>-5.59</foldx-energy>
    <ligand>M</ligand>
    <ligand-size>6</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1stsb_</scop-id>
    <ss-bindingsite>40</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-3.92</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1VWO</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>31.7804</bfactor-bindingsite>
    <bfactor-ligand>47.3803</bfactor-ligand>
    <backbone-hbond>-0.75</backbone-hbond>
    <cathid>1vwoB00</cathid>
    <dssp-bindingsite>C=31 E=46 S=8 T=15</dssp-bindingsite>
    <dssp-ligand>C=50 S=25 T=25</dssp-ligand>
    <description>STREPTAVIDIN COMPLEXED WITH CYCLO-AC-[CHPQGPPC]-NH2 MONOMER, PH 2.85</description>
    <foldx-energy>-3.59</foldx-energy>
    <ligand>P</ligand>
    <ligand-size>8</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1vwob_</scop-id>
    <ss-bindingsite>46</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-2.79</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1KL5</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>32.4282</bfactor-bindingsite>
    <bfactor-ligand>57.0677</bfactor-ligand>
    <backbone-hbond>-0.05</backbone-hbond>
    <cathid>1kl5A00</cathid>
    <dssp-bindingsite>C=18 E=55 G=9 T=18</dssp-bindingsite>
    <dssp-ligand>C=60 T=40</dssp-ligand>
    <description>an engineered streptavidin with improved affinity for the strep-tag II peptide : SAm2-StrepII</description>
    <foldx-energy>-8.2</foldx-energy>
    <ligand>E</ligand>
    <ligand-size>5</ligand-size>
    <receptor>AD</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1kl5a_</scop-id>
    <ss-bindingsite>55</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-3.26</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1VWF</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>41.9607</bfactor-bindingsite>
    <bfactor-ligand>59.4294</bfactor-ligand>
    <backbone-hbond>-0.71</backbone-hbond>
    <cathid>1vwfB00</cathid>
    <dssp-bindingsite>C=24 E=35 S=12 T=29</dssp-bindingsite>
    <dssp-ligand>C=50 S=25 T=25</dssp-ligand>
    <description>STREPTAVIDIN COMPLEXED WITH CYCLO-AC-[CHPQGPPC]-NH2 MONOMER, PH 3.67</description>
    <foldx-energy>-6.04</foldx-energy>
    <ligand>P</ligand>
    <ligand-size>8</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1vwfb_</scop-id>
    <ss-bindingsite>35</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-2.77</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1SLD</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>34.8462</bfactor-bindingsite>
    <bfactor-ligand>42.984</bfactor-ligand>
    <backbone-hbond>-0.13</backbone-hbond>
    <cathid>1sldB00</cathid>
    <dssp-bindingsite>C=23 E=46 T=31</dssp-bindingsite>
    <dssp-ligand>C=50 T=50</dssp-ligand>
    <description>STREPTAVIDIN, PH 7.5, BOUND TO CYCLIC DISULFIDE-BONDED PEPTIDE LIGAND AC-CHPQFC-NH2</description>
    <foldx-energy>-4.92</foldx-energy>
    <ligand>P</ligand>
    <ligand-size>6</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1sldb_</scop-id>
    <ss-bindingsite>46</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-3.17</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1VWA</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>31.0549</bfactor-bindingsite>
    <bfactor-ligand>55.465</bfactor-ligand>
    <backbone-hbond>-0.33</backbone-hbond>
    <cathid>1vwaB00</cathid>
    <dssp-bindingsite>C=27 E=45 T=27</dssp-bindingsite>
    <dssp-ligand>C=67 T=33</dssp-ligand>
    <description>STREPTAVIDIN-FSHPQNT</description>
    <foldx-energy>-5.73</foldx-energy>
    <ligand>M</ligand>
    <ligand-size>6</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1vwab_</scop-id>
    <ss-bindingsite>45</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-3.5</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
  <node>
    <cluster-id>26282</cluster-id>
    <pdb-id>1VWP</pdb-id>
    <alignment></alignment>
    <bfactor-bindingsite>40.8372</bfactor-bindingsite>
    <bfactor-ligand>62.0009</bfactor-ligand>
    <backbone-hbond>-0.73</backbone-hbond>
    <cathid>1vwpB00</cathid>
    <dssp-bindingsite>C=25 E=50 S=8 T=17</dssp-bindingsite>
    <dssp-ligand>C=50 S=25 T=25</dssp-ligand>
    <description>STREPTAVIDIN COMPLEXED WITH CYCLO-AC-[CHPQGPPC]-NH2 MONOMER, PH 2.5</description>
    <foldx-energy>-4.12</foldx-energy>
    <ligand>P</ligand>
    <ligand-size>8</ligand-size>
    <receptor>B</receptor>
    <scop-class>All beta proteins</scop-class>
    <scop-id>d1vwpb_</scop-id>
    <ss-bindingsite>50</ss-bindingsite>
    <ss-ligand>0</ss-ligand>
    <sidechain-hbond>-2.5</sidechain-hbond>
    <uniprot-accession>P22629</uniprot-accession>
    <uniprot-decision>Streptavidin</uniprot-decision>
    <uniprot-entry>SAV_STRAV</uniprot-entry>
    <uniprot-sequence>MRKIVVAAIAVSLTTVSITASASADPSKDSKAQVSAAEAGITGTWYNQLGSTFIVTAGADGALTGTYESAVGNAESRYVLTGRYDSAPATDGSGTALGWTVAWKNNYRNAHSATTWSGQYVGGAEARINTQWLLTSGTTEANAWKSTLVGHDTFTKVKPSAASIDAAKKAGVNNGNPLDAVQQ</uniprot-sequence>
  </node>
</xml>
