>1xbyB (B:) observed residues (from ATOM records)
slpmlqvaldnqtmdsayettrliaeevdiievgtilcvgegvravrdlkalyphkivla
dakiadagkilsrmcfeanadwvtviccadintakgaldvakefngdvqidltgywtweq
aqqwrdagigqvvyhrsrdaqaagvawgeaditaikrlsdmgfkvtvagglaledlplfk
gipihvfiagrsirdaaspveaarqfkrsiaelwg