IC50: 1.1 μM (SAMHD1)
Cephalosporin C zinc salt is a potent inhibitor of SAMHD1 with an IC 50 of 1.1 ± 0.1 μM, 200-fold more potent than Na + salt form of Cephalosporin C (ICC 50 CC-Na = 213 ± 30 μM).