Chains and heterogens:
PDB Chain Sequences:
>1pumA (A:) yerlslrtvqqttgaeyfsfitllrdfvssgsfsnqipllrqstipvsegqrfvlveltn aggdsitaaidvtnlyvvayragdqsyflkdapagaetqdfagttrsslpfngsypdler yaghrdqiplgidqliasvtalrfpggstrtqarsililiqmiseaarfnpilwrarqyi nsgasflpdvymleletswgqqstqvqhstdgvfnnpialalspgsvvtltnvrdviasl aimlfvcge
>1pumB (B:) ddvtcsasepivrivgrngmtvdvrdddfqdgnqiqlwpsksnndpnqlwtikkdgtirs ngsclttygytagvyvmifdcntavreatiwqiwgngtiinprsnlvlaassgikgttlt vqtldytlgqgwlagndtaprevtiygfrdlcmesaggsvwvetctagqenqrwalygdg sirpkqnqsqcltngrdsvstvinivscsagssgqrwvftnagailnlknglamdvaqan palariiiypatgnpnqmwlpvp