>4ym1A (A:) observed residues (from ATOM records)
ptfnppvpyfgrlqggltarrtiiikgyvpptgksfainfkvgssgdialhinprmgngt
vvrnsllngswgseekkithnpfgpgqffdlsircgldrfkvyangqhlfdfahrlsafq
rvdtleiqgdvtlsyvqi