>1t33B (B:) observed residues (from ATOM records)
ttkgeqaksqliaaalaqfgeyglhattrdiaalagqniaaityyfgskedlylacaqwi
adflgekfrphaekaerlfsqpapdrdairelillacknmimlltqedtvnlskfisreq
lsptsayqlvheqvidplhthltrlvaaytgcdandtrmilhthallgevlafrlgketi
llrtgwpqfdeekaeliyqtvtchidlilhgltq