>2ptgB (B:) observed residues (from ATOM records)
plpvdlrgktafvagvadsngygwaickllraagarvlvgtwppvysifkkvfdkiypld
avfdtpqdvppevssnyagvggftisevaeavradvgqidilvhslangpevtkpllqts
rkgylaavssssysfvsllqhflplmkeggsalalsyialesdcrtlafeagraravrvn
cisagplkelesddvgraalfllsplaravtgatlyvdnglham