Fig. 1

Parameters of liver cell proliferation in animals subjected to PH and treated with α-tocopherol and/or putrescine. Results are the mean ± SE of 5 individual observations per experimental group for cytosolic TK activity (controls = 0.20 nmol of [³H] TMP formed h⁻¹ mg⁻¹ of protein), for mitotic index (number of mitotic cells in 20 microscopic fields with a 40× objective), and those for the gain of liver mass (%) after PH. Symbols for each experimental group are indicated at the top of the figure. Statistical significance: *p < 0.01 against the control group, and **p < 0.01 vs. the group with PH only