Chains and heterogens:
PDB Chain Sequences:
>1r3cA (A:) gshmlemsqerptfyrqelnktiwevperyqnlspvgsgaygsvcaafdtktglrvavkk lsrpfqsiihakrtyrelrllkhmkhenviglldvftparsleefndvylvthlmgadln nivkcqkltddhvqfliyqilrglkyihsadiihrdlkpsnlavnedselkildfglarh tddemtgyvatrwyrapeimlnwmhynqtvdiwsvgcimaelltgrtlfpgtdhidqlkl ilrlvgtpgaellkkissesarnyiqsltqmpkmnfanvfiganplavdllekmlvldsd kritaaqalahayfaqyhdpddepvadpydqsfesrdllidewksltydevisfvpppld qeemes
>1r3cA (A:) erptfyrqelnktiwevperyqnlspvgsgaygsvcaafdtktglrvavkklsrpfqsii hakrtyrelrllkhmkhenviglldvftparsleefndvylvthlmgadlnnivkcqklt ddhvqfliyqilrglkyihsadiihrdlkpsnlavnedselkildfglarhtddemtgyv atrwyrapeimlnwmhynqtvdiwsvgcimaelltgrtlfpgtdhidqlklilrlvgtpg aellkkissesarnyiqsltqmpkmnfanvfiganplavdllekmlvldsdkritaaqal ahayfaqyhdpddepvadpydqsfesrdllidewksltydevisfvppp