>1f3tB (B:) observed residues (from ATOM records)
rflegfntrdalckkisgdpffvadlgdivrkhetwkkclprvtpfyavkcnddwrvlgt
laalgtgfdcasnteiqrvrgigvppekiiyanpckqishiryardsgvdvmtfdcvdel
ekvakthpkakmvlristdlsvkfgakvedcrfileqakklnidvtgvsfhvgsgstdas
tfaqaisdsrfvfdmgtelgfnmhildigggfpgtrdaplkfeeiagvinnalekhfppd
lkltivaepgryyvasaftlavnviakkvtqsfmyyvndgvygsfncilydhavvrplpq
repipneklypssvwgptcdgldqiveryylpemqvgewllfedmgaytvvgtssfngfq
sptiyyvvsglpdhvvrelks