Structural features of residue 221 in chain A

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Hydrogen bonds:

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|Res1 type| Res1 No.| Chain1| Res2 type| Res2 No.| Chain2|
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|        W|      221|      A|         W|      221|      B|
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|        R|      154|      C|         W|      221|      A|
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|        W|      221|      C|         W|      221|      A|
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