Chains and heterogens:
PDB Chain Sequences:
>1npmA (A:) ilegreciphsqpwqaalfqgerlicggvlvgdrwvltaahckkqkysvrlgdhslqsrd qpeqeiqvaqsiqhpcynnsnpedhshdimlirlqnsanlgdkvkpvqlanlcpkvgqkc iisgwgtvtspqenfpntlncaevkiysqnkceraypgkitegmvcagssngadtcqgds ggplvcdgmlqgitswgsdpcgkpekpgvytkicryttwikktmd
>1npmA (A:) ilegreciphsqpwqaalfqgerlicggvlvgdrwvltaahckkqkysvrlgdhslqsqp eqeiqvaqsiqhpcynnsnpedhshdimlirlqnsanlgdkvkpvqlanlcpkvgqkcii sgwgtvtspqenfpntlncaevkiysqnkceraypgkitegmvcagssngadtcqgdsgg plvcdgmlqgitswgsdpcgkpekpgvytkicryttwikktmd
>1npmB (B:) ilegreciphsqpwqaalfqgerlicggvlvgdrwvltaahckkqkysvrlgdhslqsrd qpeqeiqvaqsiqhpcynnsnpedhshdimlirlqnsanlgdkvkpvqlanlcpkvgqkc iisgwgtvtspqenfpntlncaevkiysqnkceraypgkitegmvcagssngadtcqgds ggplvcdgmlqgitswgsdpcgkpekpgvytkicryttwikktmd
>1npmB (B:) ilegreciphsqpwqaalfqgerlicggvlvgdrwvltaahckkqkysvrlgdhslqsqp eqeiqvaqsiqhpcynnsnpedhshdimlirlqnsanlgdkvkpvqlanlcpkvgqkcii sgwgtvtspqenfpntlncaevkiysqnkceraypgkitegmvcagssngadtcqgdsgg plvcdgmlqgitswgsdpcgkpekpgvytkicryttwikktmd