Chains and heterogens:
PDB Chain Sequences:
>7nxcA (A:) stieeqaktfldkfnheaedlfyqsslaswnyntniteenvqnmnnagdkwsaflkeqst laqmyplqeiqnltvklqlqalqqngssvlsedkskrlntilntmstiystgkvcnpdnp qeclllepglneimansldynerlwaweswrsevgkqlrplyeeyvvlknemaranhyed ygdywrgdyevngvdgydysrgqliedvehtfeeikplyehlhayvraklmnaypsyisp igclpahllgdmwgrfwtnlysltvpfgqkpnidvtdamvdqawdaqrifkeaekffvsv glpnmtqgfwensmltdpgnvqkavchptawdlgkgdfrilmctkvtmddfltahhemgh iqydmayaaqpfllrnganegfheavgeimslsaatpkhlksigllspdfqedneteinf llkqaltivgtlpftymlekwrwmvfkgeipkdqwmkkwwemkreivgvvepvphdetyc dpaslfhvsndysfiryytrtlyqfqfqealcqaakhegplhkcdisnsteagqklfnml rlgksepwtlalenvvgaknmnvrpllnyfeplftwlkdqnknsfvgwstdwspyadrhh hhhh
>7nxcA (A:) stieeqaktfldkfnheaedlfyqsslaswnyntniteenvqnmnnagdkwsaflkeqst laqmyplqeiqnltvklqlqalqqngssvlsedkskrlntilntmstiystgkvcnpdnp qeclllepglneimansldynerlwaweswrsevgkqlrplyeeyvvlknemaranhyed ygdywrgdyevngvdgydysrgqliedvehtfeeikplyehlhayvraklmnaypsyisp igclpahllgdmwgrfwtnlysltvpfgqkpnidvtdamvdqawdaqrifkeaekffvsv glpnmtqgfwensmltdpgnvqkavchptawdlgkgdfrilmctkvtmddfltahhemgh iqydmayaaqpfllrnganegfheavgeimslsaatpkhlksigllspdfqedneteinf llkqaltivgtlpftymlekwrwmvfkgeipkdqwmkkwwemkreivgvvepvphdetyc dpaslfhvsndysfiryytrtlyqfqfqealcqaakhegplhkcdisnsteagqklfnml rlgksepwtlalenvvgaknmnvrpllnyfeplftwlkdqnknsfvgwstdwspya
>7nxcB (B:) etghhhhhhtnlcpfgevfnatrfasvyawnrkrisncvadysvlynsasfstfkcygvs ptklndlcftnvyadsfvirgdevrqiapgqtgtiadynyklpddftgcviawnsnnlds kvggnynylyrlfrksnlkpferdisteiyqagstpcngvkgfncyfplqsygfqptygv gyqpyrvvvlsfellhapatvcgkk
>7nxcB (B:) tnlcpfgevfnatrfasvyawnrkrisncvadysvlynsasfstfkcygvsptklndlcf tnvyadsfvirgdevrqiapgqtgtiadynyklpddftgcviawnsnnldskvggnynyl yrlfrksnlkpferdisteiyqagstpcngvkgfncyfplqsygfqptygvgyqpyrvvv lsfellhapatvcgk