Chains and heterogens:
PDB Chain Sequences:
>1ffqA (A:) aapgkptiawgntkfaivevdqaataynnlvkvknaadvsvswnlwngdtgttakvllng keawsgpstgssgtanfkvnkggryqmqvalcnadgctasdateivvadtdgshlaplke plleknkpykqnsgkvvgsyfvewgvygrnftvdkipaqnlthllygfipicggnginds lkeiegsfqalqrscqgredfkvsihdpfaalqkaqkgvtawddpykgnfgqlmalkqah pdlkilpsiggwtlsdpfffmgdkvkrdrfvgsvkeflqtwkffdgvdidwefpggkgan pnlgspqdgetyvllmkelramldqlsvetgrkyeltsaisagkdkidkvaynvaqnsmd hiflmsydfygafdlknlghqtalnapawkpdtayttvngvnallaqgvkpgkivvgtam ygrgwtgvngyqnnipftgtatgpvkgtwengivdyrqiagqfmsgewqytydataeapy vfkpstgdlitfddarsvqakgkyvldkqlgglfsweidadngdilnsmnaslgnsagvq