Chains and heterogens:
PDB Chain Sequences:
>1f60A (A:) gkekshinvvvighvdsgkstttghliykcggidkrtiekfekeaaelgkgsfkyawvld klkaerergitidialwkfetpkyqvtvidapghrdfiknmitgtsqadcailiiaggvg efeagiskdgqtrehallaftlgvrqlivavnkmdsvkwdesrfqeivketsnfikkvgy npktvpfvpisgwngdnmieattnapwykgweketkagvvkgktlleaidaieqpsrptd kplrlplqdvykiggigtvpvgrvetgvikpgmvvtfapagvttevksvemhheqleqgv pgdnvgfnvknvsvkeirrgnvcgdakndppkgcasfnatvivlnhpgqisagyspvldc htahiacrfdellekndrrsgkkledhpkflksgdaalvkfvpskpmcveafseypplgr favrdmrqtvavgviksvdk
>1f60B (B:) paaksivtldvkpwddetnleemvanvkaiemegltwgahqfipigfgikklqincvved dkvslddlqqsieededhvqstdiaamqkl