Chains and heterogens:
PDB Chain Sequences:
>1fnb_ (-) qiasdveapppapakvekhskkmeegitvnkfkpktpyvgrcllntkitgddapgetwhm vfshegeipyregqsvgvipdgedkngkphklrlysiassalgdfgdaksvslcvkrliy tndagetikgvcsnflcdlkpgaevkltgpvgkemlmpkdpnatiimlgtgtgiapfrsf lwkmffekhddykfnglawlflgvptsssllykeefekmkekapdnfrldfavsreqtne kgekmyiqtrmaqyavelwemlkkdntyvymcglkgmekgiddimvslaaaegidwieyk rqlkkaeqwnvevy
>1fnb_ (-) hskkmeegitvnkfkpktpyvgrcllntkitgddapgetwhmvfshegeipyregqsvgv ipdgedkngkphklrlysiassalgdfgdaksvslcvkrliytndagetikgvcsnflcd lkpgaevkltgpvgkemlmpkdpnatiimlgtgtgiapfrsflwkmffekhddykfngla wlflgvptsssllykeefekmkekapdnfrldfavsreqtnekgekmyiqtrmaqyavel wemlkkdntyvymcglkgmekgiddimvslaaaegidwieykrqlkkaeqwnvevy