Chains and heterogens:
PDB Chain Sequences:
>1fyaA (A:) glvprgsegmqfdrgylspyfinkpetgevelespfilltdkkisnirellpvleavaka gkplliiaedvegealatlvvntmrgivkvaavkapgfgdrrkamlqdiatltggtvise elgmklekatledlgqakrvvitkdtttiidgvgeeaaiqgrvaqirqqieeatsdydre klqervaklaggv