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