>1blxB (B:) observed residues (from ATOM records)
vcvgdrlsgaaargdvqevrrllhrelvhpdalnrfgktalqvmmfgspavalellkqga
spnvqdasgtspvhdaartgfldtlkvlvehgadvnaldstgslpihlaireghssvvsf
lapesdlhhrdasgltplelarqrgaqnlmdilqghmmip