TABLE 2.

Kinetic parameters of CimHbs for uptake activity in RSO membrane vesicles

Substrate	Km (μM)	Kia (μM)	Vmaxd (nmol/min · mg of protein)
Citrate	12 ± 2		37 ± 5
S-citramalate		100 ± 20	−b
S-malate		1,500 ± 100	167 ± 20c

^aInhibition constant for the inhibition of citrate uptake. 

^bNo significant turnover was observed. 

^cCalculated using the inhibitor constant and the rate of uptake of l-malate at 19.8 μM. 

^dV_max, maximal rate of transport.