3.5.4.13 additional information the bifunctional dCMP-dCTP deaminase shows dCMP deaminase and dCTP deaminase activities, dCTP serves as a positive heterotropic effector for the dCMP deaminase activity and a positive homotropic effector for the dCTP deaminase activity, and the enzymatic efficiency of the dCMP deaminase activity is about four times higher than that of the dCTP deaminase activity, the same active site is involved in both dCMP and dCTP deaminations Paramecium bursaria Chlorella virus 1 ? - ? 89 3.5.4.13 additional information the enzyme is a bifunctional dCTP deaminase:dUTPase Mycobacterium tuberculosis ? - ? 89 3.5.4.13 additional information the enzyme is a bifunctional dCTP deaminase:dUTPase Mycobacterium tuberculosis H37Rv ? - ? 89