I am getting negative results in Peroxidase assay in E.coli bacteria upon the treament of silver nitrate (20 μg/ ml), What coulb be the reason?

I have checked the peroxidase activity of E.coli under the stress of silver nitrate (20 μg/ ml). Surprisingly, I am getting negative results means control sample (E.coli without any silver nitrate...

28 July 2017 1,907 3 View