Chains and heterogens:
PDB Chain Sequences:
>1isnA (A:) qpktftvrivtmdaemefncemkwkgkdlfdlvcrtlglretwffglqytikdtvawlkm dkkvldhdvskeepvtfhflakfypenaeeelvqeitqhlfflqvkkqildekvycppea svllasyavqakygdydpsvhkrgflaqeellpkrvinlyqmtpemweeritawyaehrg rardeaemeylkiaqdlemygvnyftirnkkgtelllgvdalglhiydpenrltpkisfp wneirnisysdkeftikpldkkidvfkfnssklrvnklilqlcignhdlfmrrrkadsle vqqmkaqareekarkqmerqrla