Chains and heterogens:
PDB Chain Sequences:
>1ctn_ (-) aapgkptiawgntkfaivevdqaataynnlvkvknaadvsvswnlwngdtgttakillng keawsgpstgssgtanfkvnkggryqmqvalcnadgctasdateivvadtdgshlaplke plleknkpykqnsgkvvgsyfvewgvygrnftvdkipaqnlthllygfipicggnginds lkeiegsfqalqrscqgredfkisihdpfaalqkaqkgvtawddpykgnfgqlmalkqah pdlkilpsiggwtlsdpfffmgdkvkrdrfvgsvkeflqtwkffdgvdidwefpggkgan pnlgspqdgetyvllmkelramldqlstetgrkyeltsaisagkdkidkvaynvaqnsmd hiflmsydfygafdlknlghqtalnapawkpdtayttvngvnallaqgvkpgkivvgtam ygrgwtgvngyqnnipftgtatgpvkgtwengivdyrqiagqfmsgewqytydataeapy vfkpstgdlitfddarsvqakgkyvldkqlgglfsweidadngdilnsmnaslgnsag