>2w3lB (B:) observed residues (from ATOM records)
ydnreivmkyihyklsqrgyewdagadsevvhktlreagddfsrryrrdfaemssglhlt
pftargrfatvveelfrdgvnwgrivaffefggvmcvesvnremsplvdnialwmteyln
rhlhtwiqdnggwdafvelygp