Chains and heterogens:
PDB Chain Sequences:
>1frqA (A:) hskkmeegitvnkfkpktpyvgrcllntkitgddapgetwhmvfshegeipyregqsvgv ipdgedkngkphklrlysiassalgdfgdaksvslcvkrliytndagetikgvcsnflcd lkpgaevkltgpvgkemlmpkdpnatiimlgtgtgiapfrsflwkmffekhddykfngla wlflgvptsssllykeefekmkekapdnfrldfavsreqtnekgekmyiqtrmaqyavel wemlkkdntyfymcglkgmekgiddimvslaaaegidwieykrqlkkaeqwnvavy