TABLE 2.

Effect of growth temperature on protease activity of P. gingivalis W50^a

Growth temp (°C)	Mean (± SD) arginine-specific activity (nmol mg−1 min−1[n = 12])		Mean (± SD) lysine-specific activity (nmol mg−1 min−1[n = 12])
	W	S	W	S
37	325 ± 74	79 ± 42	62 ± 18	15 ± 8
39	109 ± 59*	21 ± 9*	22 ± 10*	6 ± 2*
41	58 ± 16**	15 ± 5**	17 ± 3**	7 ± 1**

^aW, whole culture; S, supernatant; *, P < 0.01 for results at 37°C versus results at 39°C; **, P < 0.001 for results at 37°C versus results at 41°C.