Chains and heterogens:
PDB Chain Sequences:
>1u83A (A:) mgsshhhhhhssgrenlyfqghmndfslelpvrtnkpretgqsilidngyplqffkdaia gasdyidfvkfgwgtslltkdleekistlkehditfffggtlfekyvsqkkvnefhryct yfgceyieisngtlpmtnkekaayiadfsdeflvlsevgskdaelasrqsseewleyive dmeagaekvitearesgtggicsssgdvrfqivddiissdidinrlifeapnktlqqgfi qkigpnvnlanipfhdaialetlrlglrsdtfflgs
>1u83A (A:) dfslelpvrtnkpretgqsilidngyplqffkdaiagasdyidfvkfgwgtslltkdlee kistlkehditfffggtlfekyvsqkkvnefhryctyfgceyieisngtlpmtnkekaay iadfsdeflvlsevgskdqsseewleyivedmeagaekviteqivddiissdidinrlif eapnktlqqgfiqkigpnvnlanipfhdaialetlrlglrsdtff