. "Genetically modified source" . "pET17b" . "Sulfolobus" . "Escherichia" . . "Sulfolobus tokodaii str. 7" . . "Escherichia coli BL21(DE3)" . "BL21 (DE3)" . "PLASMID" . "Sulfolobus tokodaii" . "ST0318" . "strain 7" . "Escherichia coli" .