>1xbxA (A:) observed residues (from ATOM records)
lpmlqvaldnqtmdsayettrliaeevdiievgtilcvgegvravrdlkalyphkivlad
akiadagkilsrmcfeanadwvtviccadintakgaldvakefngdvqidltgywtweqa
qqwrdagigqvvyhrsvdaqaagvawgeaditaikrlsdmgfkvtvagglaledlplfkg
ipihvfiagrsirdaaspveaarqfkrsiaelw