Chains and heterogens:
PDB Chain Sequences:
>1dr9A (A:) vihvtkevkevatlscghnvsveelaqtriywqkekkmvltmmsgdmniwpeyknrtifd itnnlsivilalrpsdegtyecvvlkyekdafkrehlaevtlsvkadfptpsisdfeipt snirriicstsggfpephlswlengeelnainttvsqdpetelyavsskldfnmttnhsf mclikyghlrvnqtfnwnta