>3bc3A (A:) observed residues (from ATOM records)
aprsvdwrekgyvtpvknqgqcgscwafsatgalegqmfrktgrlislseqnlvdcsgpq
gnegcngglmdyafqyvqdnggldseesypyeateesckynpkysvandtgfvdipkqek
almkavatvgpisvaidaghesflfykegiyfepdcssedmdhgvlvvgygfesnkywlv
knswgeewgmggyvkmakdrrnhcgiasaasyptv