Chains and heterogens:
PDB Chain Sequences:
>1isrA (A:) ssqrsvarmdgdviigalfsvhhqppaekvperkcgeireqygiqrveamfhtldkinad pvllpnitlgseirdscwhssvaleqsiefirdslisirdekdglnrclpdgqtlppgrt kkpiagvigpgsssvaiqvqnllqlfdipqiaysatsidlsdktlykyflrvvpsdtlqa ramldivkrynwtyvsavhtegnygesgmdafkelaaqeglciahsdkiysnageksfdr llrklrerlpkarvvvcfcegmtvrgllsamrrlgvvgefsligsdgwadrdeviegyev eanggitiklqspevrsfddyflklrldtntrnpwfpefwqhrfqcrlpghllenpnfkk vctgnesleenyvqdskmgfvinaiyamahglqnmhhalcpghvglcdamkpidgrklld flikssfvgvsgeevwfdekgdapgrydimnlqyteanrydyvhvgtwhegvlniddyki qmnksgmvrs
>1isrA (A:) rsvarmdgdviigalfsvhhqppaekvperkcgeireqygiqrveamfhtldkinadpvl lpnitlgseirdscwhssvaleqsiefirkpiagvigpgsssvaiqvqnllqlfdipqia ysatsidlsdktlykyflrvvpsdtlqaramldivkrynwtyvsavhtegnygesgmdaf kelaaqeglciahsdkiysnageksfdrllrklrerlpkarvvvcfcegmtvrgllsamr rlgvvgefsligsdgwadrdeviegyeveanggitiklqspevrsfddyflklrldtntr npwfpefwqhrfqcrlpghllenpnfkkvctgnesleenyvqdskmgfvinaiyamahgl qnmhhalcpghvglcdamkpidgrklldflikssfvgvsgeevwfdekgdapgrydimnl qyteanrydyvhvgtwhegvlniddyki