Table 2.

Inhibition rate of Free PR on B16 cell proliferation (n = 6, $\overline{\mathrm{x}}$ ± s).

Concentration (μg/mL)	Inhibition Rate/%
	24 h	48 h
0	0	0
5	−0.42 ± 0.52	−1.07 ± 0.26
10	8.41 ± 1.08	12.16 ± 1.37
20	24.19 ± 2.69	32.54 ± 2.34
50	42.93 ± 3.08	52.24 ± 1.52
100	60.94 ± 1.83	69.51 ± 0.43
200	65.43 ± 0.98	72.92 ± 1.27
500	73.14 ± 2.18	79.42 ± 0.49