>1ys7B (B:) observed residues (from ATOM records)
sprvlvvdddsdvlaslerglrlsgfevatavdgaealrsatenrpdaivldinmpvldg
vsvvtalramdndvpvcvlsarssvddrvagleagaddylvkpfvlaelvarvkallrrr
gstatsssetitvgplevdipgrrarvngvdvdltkrefdllavlaehktavlsraqlle
lvwgydfaadtnvvdvfigylrrkleaggprllhtvrgvgfvlrmq