>3iv2B (B:) observed residues (from ATOM records)
aprsvdwrekgyvtpvknqgqcgsawafsatgalegqmfrktgrlislseqnlvdcsgpq
gnegcngglmdyafqyvqdnggldseesypyeateesckynpkysvandtgfvdipkqek
almkavatvgpisvaidaghesflfykegiyfepdcssedmdhgvlvvgygfesnnkywl
vknswgeewgmggyvkmakdrrnhcgiasaasyptv