Chains and heterogens:
PDB Chain Sequences:
>1s3xA (A:) makaaaigidlgttyscigvfqhgkveiiandqgnrttpsyvaftdterligdaaknqva lnpqntvfdakrligrkfgdpvvqsdmkhwpfqvindgdkpkvqvsykgetkafypeeis smvltkmkeiaeaylgypvtnavitvpayfndsqrqatkdagviaglnvlriineptaaa iaygldrtgkgernvlifdlgggtfdvsiltiddgifevkatagdthlggedfdnrlvnh fveefkrkhkkdisqnkravrrlrtacerakrtlssstqasleidslfegidfytsitra rfeelcsdlfrstlepvekalrdakldkaqihdlvlvggstripkvqkllqdffngrdln ksinpdeavaygaavqaailmg
>1s3xA (A:) kaaaigidlgttyscigvfqhgkveiiandqgnrttpsyvaftdterligdaaknqvaln pqntvfdakrligrkfgdpvvqsdmkhwpfqvindgdkpkvqvsykgetkafypeeissm vltkmkeiaeaylgypvtnavitvpayfndsqrqatkdagviaglnvlriineptaaaia ygldrtgkgernvlifdlgggtfdvsiltiddgifevkatagdthlggedfdnrlvnhfv eefkrkhkkdisqnkravrrlrtacerakrtlssstqasleidslfegidfytsitrarf eelcsdlfrstlepvekalrdakldkaqihdlvlvggstripkvqkllqdffngrdlnks inpdeavaygaavqaailmg