1.5 x 10e7 THP-1 cells were incubated with 100 nM GF 109203X (ab144264) or Ro 31-8220 mesylate (ab120374) for 30 minutes prior to activation with 10 µg x mL-1 PMA (Sigma) for 4 hours. Control cells were left without inhibitors or PMA. Cells were lysed in 1 mL of lysis buffer, and 30 µL were tested for PKC activity (duplicates; +/- SD).