>2a3rA (A:) observed residues (from ATOM records)
rppleyvkgvplikyfaealgplqsfqarpddllintypksgttwvsqildmiyqggdle
kcnrapiyvrvpflevndpgepsgletlkdtppprlikshlplallpqtlldqkvkvvyv
arnpkdvavsyyhfhrmekahpepgtwdsflekfmagevsygswyqhvqewwelsrthpv
lylfyedmkenpkreiqkilefvgrslpeetmdfmvqhtsfkemkknpmtnyttvpqelm
dhsispfmrkgmagdwkttftvaqnerfdadyaekmagcslsfrsel