>4f3pB (B:) observed residues (from ATOM records)
kelvvgtdtsfmpfefkqgdkyvgfdldlwaeiakgagwtykiqpmdfaglipalqtqni
dvalsgmtikeerrkaidfsdpyydsglaamvqannttiksiddlngkviaaktgtatid
wikahlkpkeirqfpnidqaylaleagrvdaamhdtpnvlffvnnegkgrvkvagapvsg
dkygigfpkgsplvakvnaelarmkadgryakiykkwfgq