>2c4kA (A:) observed residues (from ATOM records)
gyrvfsanstaactelakriterlgaelgksvvyqetngetrveikesvrgqdifiiqti
prdvntavmellimayalktacarniigvipyfpyskqskmrkrgsivckllasmlakag
lthiitmdlhqkeiqgffsfpvdnlraspfllqyiqeeipnyrnavivakspdaakraqs
yaerlrlglavihppitvvgdvggriaiivddiiddvesfvaaaeilkergaykiyvmat
hgilsaeaprlieessvdevvvtntvphevqklqcpkiktvdislilseairrihngesm
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