>2an3B (B:) observed residues (from ATOM records)
apdsapgqaavasayqrfepraylrnnyapprgdlcnpngvgpwklrclaqtfatgevsg
rtlidigsgptvyqllsacshfeditmtdflevnrqelgrwlqeepgafnwsmysqhacl
iegkgecwqdkerqlrarvkrvlpidvhqpqplgagspaplpadalvsafcleavspdla
sfqraldhittllrpgghllligaleeswylagearltvvpvseeevrealvrsgykvrd
lrtyimpahlqtgvddvkgvffawaqkvg