Table 2.

Chymotrypsin activity in cytoplasmic extracts (S100 fraction) of FEK4 cells after 250 kJ/m² UVA irradiation. Activity is expressed as nanomols 4-nitroaniline liberated per minute per milligram protein

Sample	4-nitroaniline released
Unirradiated control	0.43  ±  0.10
UVA	1.36  ±  0.13

Results expressed as means ± SD of triplicate analyses of n = 6 independent experiments. Statistical analyses were made using a paired t test. ∗, Significantly different from unirradiated control (p < 0.05 level).