Chains and heterogens:
PDB Chain Sequences:
>4pr4A (A:) asrillnngakmpilglgtwksppgqvteavkvaidvgyrhidcahvyqnenevgvaiqe klreqvvkreelfivsklwctyhekglvkgacqktlsdlkldyldlylihwptgfkpgke ffpldesgnvvpsdtnildtwaameelvdeglvkaigisnfnhlqvemilnkpglkykpa vnqiechpyltqekliqycqskgivvtaysplgspdrpwakpedpslledprikaiaakh nkttaqvlirfpmqrnlvvipksvtperiaenfkvfdfelssqdmttllsynrnwrvcal lsctshkdypfheef