Chains and heterogens:
PDB Chain Sequences:
>2vibA (A:) mkylpqqdpqvfaaieqerkrqhakieliasenfvsravmeaqgsvltnkyaegypgrry yggceyvdiveelarerakqlfgaehanvqphsgaqanmavyftvlehgdtvlgmnlshg ghlthgspvnfsgvqynfvaygvdpethvidyddvrekarlhrpklivaaaaaypriidf akfreiadevgaylmvdmahiaglvaaglhpnpvpyahfvtttthktlrgprggmilcqe qfakqidkaifpgiqggplmhviaakavafgealqddfkayakrvvdnakrlasalqneg ftlvsggtdnhlllvdlrpqqltgktaekvldevgitvnkntipydpespfvtsgirigt aavttrgfgleemdeiaaiiglvlknvgseqaleearqrvaaltd