Table 1. Frequencies of homologous recombination in primary fibroblasts
Experiments n Frequency, mean × 10-6
Ear fibroblasts
    1 17 4.7
    2 22 3.9
    3 20 3.5
Embryo fibroblasts
    1 16 22.0
    2 9 32.0
    3 17 50.0
  • The averages ± SD were 4.0 ± 0.6 (ear fibroblasts) and 34.7 ± 14.2 (embryo fibroblasts), which show a significant difference (Student's t test; P < 0.05).