reporter gene assay evidence beta-galactosidase reporter gene assay evidence ECO:0001802 A type of reporter gene assay evidence based on the fusion of the lacZ gene to a specific promoter for the expression of beta-galactosidase which will appear blue when grown on a X-gal medium. beta-galactosidase assay evidence ECO:0000297 swolfish eco lacZ reporter gene assay LacZ transcript localization evidence beta-gal reporter gene assay CollecTF For each of the three genes, there was a significant increase of beta-galactosidase activity in Deltazur compared to WT when they grew in TMH with the addition of zinc. Thus, Zur repressed the promoter activities of znuC, znuA and ykgM. 2015-10-29T15:57:10Z The assay is often performed using a plasmid borne construction on a lacZ strain.