Chains and heterogens:
PDB Chain Sequences:
>1sz6A (A:) yerlslrtvqqttgaeyfsfitllrdfvssgsfsnnipllrqstipvsegsrfvlveltn aggdsitaaidvtnlyvvayqagqqsyflkdapagaetqdfagttrsslpfngsypdler yaghrdqiplgidqliasvtalrfpggstrtqarsililiqmiseaarfnpilwrarqyi nsgasflpdvymleletswgqqstqvqhstdgvfnnpialalppgnvvtltnirdviasl aimlfvcge
>1sz6B (B:) ddvtcsasepivrivgrngmtvdvrdddfqdgnqiqlwpsksnndpnqlwtikkdgtirs ngsclttygytagvyvmifdcntavreatiwqiwgngtiinprsnlvlaassgikgttlt vqtldytlgqgwlagndtaprevtiygfrdlcmesaggsvwvetctagqenqrwalygdg sirpkqnqsqcltngrdsvstvinivscsagssgqrwvftnagailnlknglamdvaqan palariiiypatgnpnqmwlpvp