Chains and heterogens:
PDB Chain Sequences:
>1u3cA (A:) msgsvsgcgsggcsivwfrrdlrvednpalaaavragpvialfvwapeeeghyhpgrvsr wwlknslaqldsslrslgtclitkrstdsvaslldvvkstgasqiffnhlydplslvrdh rakdvltaqgiavrsfnadllyepwevtdelgrpfsmfaafwerclsmpydpespllppk kiisgdvskcvadplvfeddsekgsnallarawspgwsngdkalttfingplleysknrr kadsattsflsphlhfgevsvrkvfhlvrikqvawanegneageesvnlflksiglreys ryisfnhpysherpllghlkffpwavdenyfkawrqgrtgyplvdagmrelwatgwlhdr irvvvssffvkvlqlpwrwgmkyfwdtlldadlesdalgwqyitgtlpdsrefdridnpq fegykfdpngeyvrrwlpelsrlptdwihhpwnapesvlqaagielgsnyplpivgldea karlhealsqmwqleaasraaiengseeg
>1u3cA (A:) csivwfrrdlrvednpalaaavragpvialfvwapeeeghyhpgrvsrwwlknslaqlds slrslgtclitkrstdsvaslldvvkstgasqiffnhlydplslvrdhrakdvltaqgia vrsfnadllyepwevtdelgrpfsmfaafwerclsmpydpespllppkkiisgdvskcva dplvfeddsekgsnallarawspgwsngdkalttfingplleysknrrkadsattsflsp hlhfgevsvrkvfhlvrikqvawanegneageesvnlflksiglreysryisfnhpyshe rpllghlkffpwavdenyfkawrqgrtgyplvdagmrelwatgwlhdrirvvvssffvkv lqlpwrwgmkyfwdtlldadlesdalgwqyitgtlpdsrefdridnpqfegykfdpngey vrrwlpelsrlptdwihhpwnapesvlqaagielgsnyplpivgldeakarlhealsqmw qleaa