>2ptfB (B:) SEQRES residues mslsgalkensgkpseveythfkdlqalemergrlyetivvtwddsmvgnaapigvlctg ddtvtlylyqgtrtvenvlnngrftvnvtldpliftdstlgdleedmfshyrdflhlrga dafftaevvsvkklvkrdrfgeselhvvkaragdvmraesfrmalnrgiyaviesliayt raefsdplvlreriaemnrvarkvggprekeamrriiqaleskiseghhhhhh