Chains and heterogens:
PDB Chain Sequences:
>1pgs_ (-) dntvniktfdkvknafgdglsqsaegtftfpadvttvktikmfiknecpnktcdewdrya nvyvknkttgewyeigrfitpywvgteklprgleidvtdfksllsgntelkiytetwlak greysvdfdivygtpdykysavvpviqynkssidgvpygkahtlglkkniqlptntekay lrttisgwghakpydagsrgcaewcfrthtiainnantfqhqlgalgcsanpinnqspgn wtpdragwcpgmavptridvlnnsltgstfsyeykfqswtnngtngdafyaissfviaks ntpisapvvtn