Table I. The K_0.5(DIC) value of cia6-comp was recovered to the wild-type (D66) level.

K_0.5(DIC) is calculated by regression analysis from three individual experiments using the Michaelis-Menten kinetics equation V = V_max[S]/(K_m + [S]), in which [S] equals the bicarbonate concentration, V equals the oxygen evolution rate at each bicarbonate concentration, V_max equals the maximum oxygen evolution rate when bicarbonate concentration is saturated, and K_m equals K_0.5(DIC).

Condition	D66	cia6	cia5	cia6-comp
High CO2	179 ± 23	296 ± 24	444 ± 46	106 ± 8
Low CO2	29 ± 7	106 ± 17	138 ± 26	25 ± 1