Chains and heterogens:
PDB Chain Sequences:
>1qsaA (A:) dsldeqrsryaqikqawdnrqmdvveqmmpglkdyplypyleyrqitddlmnqpavtvtn fvranptlppartlqsrfvnelarredwrgllafspekpgtteaqcnyyyakwntgqsee awqgakelwltgksqpnacdklfsvwrasgkqdplaylerirlamkagntglvtvlagqm padyqtiasaiislannpntvltfarttgatdftrqmaavafasvarqdaenarlmipsl aqaqqlnedqiqelrdivawrlmgndvtdeqakwrddaimrsqstslierrvrmalgtgd rrglntwlarlpmeakekdewrywqadlllergreaeakeilhqlmqqrgfypmvaaqri geeyelkidkapqnvdsaltqgpemarvrelmywnldntarsewanlvkskskteqaqla ryafnnqwwdlsvqatiagklwdhleerfplayndlfkrytsgkeipqsyamaiarqesa wnpkvkspvgasglmqimpgtathtvkmfsipgysspgqlldpetninigtsylqyvyqq fgnnrifssaaynagpgrvrtwlgnsagridavafvesipfsetrgyvknvlaydayyry fmgdkptlmsatewgrry