>3a7iA (A:) observed residues (from ATOM records)
mqnlkadpeelftklekigkgsfgevfkgidnrtqkvvaikiidleeaedeiediqqeit
vlsqcdspyvtkyygsylkdtklwiimeylgggsaldllepgpldetqiatilreilkgl
dylhsekkihrdikaanvllsehgevkladfgvagqltdtqikrntfvgtpfwmapevik
qsaydskadiwslgitaielargepphselhpmkvlflipknnpptlegnyskplkefve
aclnkepsfrptakellkhkfilrnakktsyltelidrykrwkaeqs