Table 2.

Expression of TPST in mammalian cells

Cell	Transfection	Specific activity, units/mg	Induction, fold
CHO-K1	Mock	0.25  ±  0.11 (3)	—
	hTPST-HPC4	2.31  ±  0.89 (3)	9
293-T	Mock	0.11  ±  0.03 (9)	—
	hTPST-HPC4	8.84  ±  1.53 (5)	80
	mTPST	8.10  ±  1.37 (4)	74

Values are the mean ± SD of the indicated (in parentheses) number of transfections. Induction of TPST activity was calculated as the ratio of the mean specific activity of TPST transfected vs. the mean specific activity of mock-transfected cells extracts.