| Addition | [3H]-Thymidine Incorporation (cpm) | PKC activity (μg of protein) | Number of experiments (n) |
| None | 1380 ± 129 | 0.024 ± 0.001 | 5 |
| PMA 18 nM | 2410 ± 211 | 0.064 ± 0.004 | 4 |
| PMA 18 nM + calphostin C 1 × 10−9 M | 1552 ± 154 | 0.028 ± 0.002 | 4 |