Chains and heterogens:
PDB Chain Sequences:
>1xszA (A:) gashpeiekaqreiieafnakpknginkikeiceqykispneeiaeffhqqrknldleav gdylsspeaenqqvlkaftsqmnfngqsfveglrtflktfklpgeaqkidrlvqsfsgay fqqnpdvvsnadaayllafqtimlntdlhnpsipeknkmtvdglkrnlrggnnggdfdak fleelyseikakpfelnfvktspgyeltsttlnkdstfkkldsflhstdvnintvfpgig dnvkttvdqpkswlsfftgykgtitltdnktsaqatiqvytpnifskwlfgeqprviiqp gqtkesidlaakaaadfsspvknfkatydyevgdlikaydnqkklitiernlalka
>1xszB (B:) gashpeiekaqreiieafnakpknginkikeiceqykispneeiaeffhqqrknldleav gdylsspeaenqqvlkaftsqmnfngqsfveglrtflktfklpgeaqkidrlvqsfsgay fqqnpdvvsnadaayllafqtimlntdlhnpsipeknkmtvdglkrnlrggnnggdfdak fleelyseikakpfelnfvktspgyeltsttlnkdstfkkldsflhstdvnintvfpgig dnvkttvdqpkswlsfftgykgtitltdnktsaqatiqvytpnifskwlfgeqprviiqp gqtkesidlaakaaadfsspvknfkatydyevgdlikaydnqkklitiernlalka