Chains and heterogens:
PDB Chain Sequences:
>1fi4A (A:) vytasvtapvniatlkywgkrdtklnlptnssisvtlsqddlrtltsaatapeferdtlw lngephsidnertqnclrdlrqlrkemeskdaslptlsqwklhivsennfptaaglassa agfaalvsaiaklyqlpqstseisriarkgsgsacrslfggyvawemgkaedghdsmavq iadssdwpqmkacvlvvsdikkdvsstqgmqltvatselfkeriehvvpkrfevmrkaiv ekdfatfaketmmdsnsfhatcldsfppifymndtskriiswchtinqfygetivaytfd agpnavlyylaenesklfafiyklfgsvpgwdkkftteqleafnhqfessnftareldle lqkdvarviltqvgsgpqetneslidaktgl