>1yt1B (B:) observed residues (from ATOM records)
gshmlreksekfafqaevnrmmkliinslyknkeiflrelisnasdaldkirlisltden
alagneeltvkikcdkeknllhvtdtgvgmtreelvknlgtiaksgtseflnkmteaqed
gqstseligqfgvgfysaflvadkvivtskhnndtqhiwesdsnefsviadprgntlgrg
ttitlvlkeeasdyleldtiknlvkkysqfinfpiyvwssktktvwdwelmn