Chains and heterogens:
PDB Chain Sequences:
>1x6nA (A:) mrkfnkpllalligstlcsaaqaaapgkptiawgntkfaivevdqaataynnlvkvknaa dvsvswnlwngdagttakillngkeawsgpstgssgtanfkvnkggryqmqvalcnadgc tasdateivvadtdgshlpplkeslleknkpykqnsgkvvgsyfveagvygrnftvdkip aqnlthllygfipicggngindslkeiegsfqalqrscqgredfkisihdpfaalqkaqk gvtawddpykgnfgqlmalkqahpdlkilpsiggwtlsdpfffmgdkvkrdrfvgsvkef lqtwkffdgvdidwefpggkganpnlgspqdgetyvllmkelramldqlsaetgrkyelt saisagkdkidkvaynvaqnsmdhiflmsydfygafdlknlghqtalnapawkpdtaytt vngvnallaqgvkpgkivvgtamygrgwtgvngyqnnipftgtatgpvkgtwengivdyr qiasqfmsgewqytydataeapyvfkpstgdlitfddarsvqakgkyvldkqlgglfswe idadngdilnsmnaslgnsagvq
>1x6nA (A:) aapgkptiawgntkfaivevdqaataynnlvkvknaadvsvswnlwngdagttakillng keawsgpstgssgtanfkvnkggryqmqvalcnadgctasdateivvadtdgshlpplke slleknkpykqnsgkvvgsyfveagvygrnftvdkipaqnlthllygfipicggnginds lkeiegsfqalqrscqgredfkisihdpfaalqkaqkgvtawddpykgnfgqlmalkqah pdlkilpsiggwtlsdpfffmgdkvkrdrfvgsvkeflqtwkffdgvdidwefpggkgan pnlgspqdgetyvllmkelramldqlsaetgrkyeltsaisagkdkidkvaynvaqnsmd hiflmsydfygafdlknlghqtalnapawkpdtayttvngvnallaqgvkpgkivvgtam ygrgwtgvngyqnnipftgtatgpvkgtwengivdyrqiasqfmsgewqytydataeapy vfkpstgdlitfddarsvqakgkyvldkqlgglfsweidadngdilnsmnaslgnsagv