Chains and heterogens:
PDB Chain Sequences:
>1b71A (A:) mkslkgsrtekniltafagesqarnrynyfggqakkdgfvqisdifaetadqerehakrl fkfleggdleivaafpagiiadthanliasaagehheytemypsfariareegyeeiarv fasiavaeefhekrfldfarnikegrvflreqatkwrcrncgyvhegtgapelcpacahp kahfellginw