2.7.1.58 expression in Escherichia coli strain BL21 (DE3) from plasmid pRK1037 harboring a fusion protein construct containing an N-terminal maltose-binding protein followed by a tobacco vein mottling virus protease cleavage site, a His6 -tag, a TEV protease cleavage site and the target protein 2-oxo-3-deoxygalactonate kinase 2.7.1.58 gene kdgK1, recombinant overexpression in Haloferax volcanii strain H1209