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. 2004 Dec 29;102(2):273–278. doi: 10.1073/pnas.0407239102

Table 1. Comparison of the pH dependence of the kinetic parameters of sweet potato and pig PAP.

	Sweet potato PAP			Pig PAP^*
pH	k_cat, s^-1	K_m, μM	k_cat/K_m, s^-1·mM^-1	k_cat, s^-1	K_m, μM	k_cat/K_m, s^-1·mM^-1
3.5	810 ± 77	44 ± 6	18,000 ± 3,100	88 ± 2	62 ± 5	1,400 ± 120
4	1,700 ± 120	68 ± 5	26,000 ± 2,600	180 ± 3	200 ± 14	880 ± 60
4.5	2,100 ± 170	68 ± 10	30,000 ± 5,100	280 ± 17	390 ± 31	730 ± 73
5	2,200 ± 140	93 ± 12	23,000 ± 3,400	380 ± 12	750 ± 70	510 ± 50
6	2,400 ± 160	330 ± 14	7,400 ± 590	240 ± 3	1,700 ± 70	140 ± 6
6.5	3,200 ± 210	930 ± 33	3,500 ± 260	150 ± 4	3,900 ± 200	38 ± 2
7	3,600 ± 290	1,800 ± 120	5,000 ± 200	5 ± 2	37,000 ± 27,000	0.14 ± 0.12
8	950 ± 67	5,000 ± 450	190 ± 22	n.d.	n.d.	n.d.

When measuring the pH dependence of the kinetic parameters, 4-nitrophenol phosphate was used as a substrate. n.d., not determined.

^*

See ref. 50