>1xbxB (B:) observed residues (from ATOM records)
slpmlqvaldnqtmdsayettrliaeevdiievgtilcvgegvravrdlkalyphkivla
dakiadagkilsrmcfeanadwvtviccadintakgaldvakefngdvqidltgywtweq
aqqwrdagigqvvyhrsvdaqaagvawgeaditaikrlsdmgfkvtvagglaledlplfk
gipihvfiagrsirdaaspveaarqfkrsiaelwg