Chains and heterogens:
PDB Chain Sequences:
>1bsvA (A:) kqrvfiaghrgmvgsairrqleqrgdvelvlrtrdelnlldsravhdffaseridqvyla aakvggivanntypadfiyqnmmiesniihaahqndvnkllflgssciypklakqpmaes ellqgtleptnepyaiakiagiklcesynrqygrdyrsvmptnlygphdnfhpsnshvip allrrfheataqnapdvvvwgsgtpmreflhvddmaaasihvmelahevwlentqpmlsh invgtgvdctirelaqtiakvvgykgrvvfdaskpdgtprklldvtrlhqlgwyheisle aglastyqwflenqdrf