Chains and heterogens:
PDB Chain Sequences:
>1z3vA (A:) eqagtntaenhpqlqsqqcttsggckplstkvvldsnwrwvhstsgytncytgnewdtsl cpdgktcaancaldgadysgtygitstgtaltlkfvtgsnvgsrvylmaddthyqllkll nqeftfdvdmsnlpcglngalylsamdadggmskypgnkagakygtgycdsqcpkdikfi ngeanvgnwtetgsntgtgsygtccsemdiweanndaaaftphpctttgqtrcsgddcar ntglcdgdgcdfnsfrmgdktflgkgmtvdtskpftvvtqfltndntstgtlseirriyi qngkviqnsvanipgvdpvnsitdnfcaqqktafgdtnwfaqkgglkqmgealgngmvla lsiwddhaanmlwldsdyptdkdpsapgvargtcattsgvpsdvesqvpnsqvvfsnikf gdigstfsgts