Chains and heterogens:
PDB Chain Sequences:
>1npc_ (-) vtgtnkvgtgkgvlgdtkslnttlsgssyylqdntrgatiftydaknrstlpgtlwadad nvfnaaydaaavdahyyagktydyykatfnrnsindagaplkstvhygsnynnafwngsq mvygdgdgvtftslsggidvighelthavtenssnliyqnesgalneaisdifgtlvefy dnrnpdweigediytpgkagdalrsmsdptkygdpdhyskrytgssdnggvhtnsgiink qayllanggthygvtvtgigkdklgaiyyrantqyftqsttfsqaragavqaaadlygan saevaavkqsfsavgvn