Chains and heterogens:
PDB Chain Sequences:
>1n6aA (A:) hgvcwiyypdggslvgevnedgemtgekiayvypdertalygkfidgemiegklatlmst eegrphfelmpgnsvyhfdkstsscistnallpdpyeservyvaeslissageglfskva vgpntvmsfyngvrithqevdsrdwalngntlsldeetvidvpepynhvskycaslghka nhsftpnciydmfvhprfgpikcirtlraveadeeltvaygydhsppgksgpeapewyqv elkafq
>1n6aA (A:) hgvcwiyypdggslvgevnedgemtgekiayvypdertalygkfidgemiegklatlmst eegrphfelmpgnsvyhfdkstsscistnallpdpyeservyvaeslissageglfskva vgpntvmsfyngvrithqevdsrdwalngntlsldeetvidvpepynhvskycaslghka nhsftpnciydmfvhprfgpikcirtlraveadeeltvaygypewyqvelkafq