Chains and heterogens:
PDB Chain Sequences:
>1n2kA (A:) rppnivlifaddlgygdlgcyghpssttpnldqlaagglrftdfyvpvslstpsraallt grlpvrmgmypgvlvpssrgglpleevtvaevlaargyltgmagkwhlgvgpegaflpph qgfhrflgipyshdqgpcqnltcfppatpcdggcdqglvpipllanlsveaqppwlpgle arymafahdlmadaqrqdrpfflyyashhthypqfsgqsfaersgrgpfgdslmeldaav gtlmtaigdlglleetlviftadngpetmrmsrggcsgllrcgkgttyeggvrepalafw pghiapgvthelassldllptlaalagaplpnvtldgfdlsplllgtgksprqslffyps ypdevrgvfavrtgkykahfftqgsahsdttadpachasssltaheppllydlskdpgen ynllggvagatpevlqalkqlqllkaqldaavtfgpsqvargedpalqicchpgctprpa cchcpdpha
>1n2kA (A:) rppnivlifaddlgygdlgcyghpssttpnldqlaagglrftdfyvpvslstpsraallt grlpvrmgmypgvlvpssrgglpleevtvaevlaargyltgmagkwhlgvgpegaflpph qgfhrflgipyshdqgpcqnltcfppatpcdggcdqglvpipllanlsveaqppwlpgle arymafahdlmadaqrqdrpfflyyashhthypqfsgqsfaersgrgpfgdslmeldaav gtlmtaigdlglleetlviftadngpetmrmsrggcsgllrcgkgttyeggvrepalafw pghiapgvthelassldllptlaalagaplpnvtldgfdlsplllgtgksprqslffyps ypdevrgvfavrtgkykahfftqgsahsdttadpachasssltaheppllydlskdpgen ynllgatpevlqalkqlqllkaqldaavtfgpsqvargedpalqicchpgctprpacchc pd