Table 2.

Inhibition constant of the OTC substrate in rat liver (From Lusty et al., 1979).

Inhibitor AAs	Ki (mM)
L-Norvaline	0.071
L-α-Aminobutyrate	0.58
L-Leucine	1.20
L-Isoleucine	10.5
L-Valine	12.5
L-Histidine	40
L-Methionine	≈50
L-Glutamine	≈50
L-Lysine	NA
Pi	0.25