Table 1.

Model Parameters

	UT/UR			AT/AR
		Literature	Fitted		Literature	Fitted
Maximum enzyme rates	VUT	—	119.7 μM/min	VAT	—	976.9 μM/min
	VUR	—	14.7 μM/min	VAR	—	473.4 μM/min
Michaelis-Menten constants	Km,GlnB	3 μM (11)	—	Km,GS	—	133.8 μM
	Km,GlnB-U	2 μM (11)	—	Km,GS-A	—	56.1 μM
	Km,GlnK	—	9.9 μM
	Km,GlnK-U	—	59.8 μM
Dissociation constants	KGLN,1	90 μM (11)	—	$\overline{K_{\text{GlnB}}}$	15.0 μM (7)	—
	Kα-KG,1	—	3.0 mM	$\overline{K_{\text{GlnB}\text{-}\text{U}}}$	0.25 μM (7)	—
				$\overline{K_{\text{GlnK}}}$	—	8.3 μM
				$\overline{K_{\text{GlnK}\text{-}\text{U}}}$	—	9.7 μM
				KGLN,2	—	1.4 mM
				Kα-KG,2	—	0.89 mM
Hill coefficients	nUT	3 (17)	—	nAT	—	2
Fractional sequestration	x	—	0.4