>3dtfB (B:) observed residues (from ATOM records)
leftvsantnpatdavresilanpgfgkyytdhmvsidytvdegwhnaqvipygpiqldp
saivlhygqeifeglkayrwadgsivsfrpeanaarlqssarrlaipelpeevfieslrq
liavdekwvppaggeeslylrpfviatepglgvrpsneyrylliaspagayfkggikpvs
vwlsheyvraspggtgaakfggnyaasllaqaqaaemgcdqvvwldaierryveemggmn
lffvfgsggsarlvtpelsgsllpgitrdsllqlatdagfaveerkidvdewqkkagage
itevfacgtaavitpvshvkhhdgeftiadgqpgeitmalrdtltgiqrgtfadthgwma
rln