Chains and heterogens:
PDB Chain Sequences:
>3prnA (A:) mislngygrfglqyvedrgvgledtiissrlrinivgttetdqgvtfgaklrmqwddgda fagtagnaaqfwtsyngvtvsvgnvdtafdsvaltydsemgyewssfgdaqssffaynsk ydasgaldnyngiavtysisgvnlylsyvdpdqtvdsslvteefgiaadwsndmislaaa yttdaggivdndiafvgaaykfndagtvglnwydnglstagdqvtlygnyafgattvray vsdidragadtaygigadyqfaegvkvsgsvqsgfanetvadvgvrfdf