>4k3vB (B:) observed residues (from ATOM records)
gklkvvttnsilydmaknvggdnvdihsivpvgqdpheyevkpkdikkltdadvilyngl
nletgngwfekaleqagkslkdkkviavskdvkpiylngeegnkdkqdphawlsldngik
yvktiqqtfidndkkhkadyekqgnkyiaqleklnndskdkfndipkeqramitsegafk
yfskqygitpgyiweintekqgtpeqmrqaiefvkkhklkhllvetsvdkkameslseet
kkdifgevytdsigkegtkgdsyykmmksnietvhgsm