Chains and heterogens:
PDB Chain Sequences:
>3s3iA (A:) erptfyrqelnktiwevperyqnlspvgsgaygsvcaafdtktglrvavkklsrpfqsii hakrtyrelrllkhmkhenviglldvftparsleefndvylvthlmgadlnnivkcqklt ddhvqfliyqilrglkyihsadiihrdlkpsnlavnedcelkildfglarhtddemtgyv atrwyrapeimlnwmhynqtvdiwsvgcimaelltgrtlfpgtdhidqlklilrlvgtpg aellkkissesarnyiqsltqmpkmnfanvfiganplavdllekmlvldsdkritaaqal ahayfaqyhdpddepvadpydqsfesrdllidewksltydevisfvppp