Structural features of residue 9 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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|        R|        9|      A|         V|       81|      B|
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|        R|        9|      A|         Q|       82|      B|
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|        E|       83|      B|         R|        9|      A|
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