>2z3fF (F:) observed residues (from ATOM records)
ivnilsvnvlnnpakfsdpykfeitfecleplksdlewkltyvgsatsqsydqildtllv
gpipiginkfvfeadppnidllpqlsdvlgvtvillscayednefvrvgyyvnnemegln
lqemddaeikkvkvdiskvwrsilaekprvtrfniqwdn