Table 1.

Confirmed and potential C_i transport systems in C. reinhardtii.

Cellular Location	Protein	Function	Regulation of Gene Expression		Acclimation State
			Low CO2	CIA5
Plasma membrane	HLA3	HCO3− transport	+	+	VL-cells
	LCI1	CO2 uptake	+	+(via LCR1)	L-cells
	RHP1	CO2 uptake	−	+	H-cells
	RHP2	CO2 uptake	−	n/d	H-cells
Chloroplast envelope	LCIA	HCO3− transport	+	+	VL-cells
Thylakoid membrane	CIA8	HCO3− transport (?)	+	−	H-, L-, VL-cells
	BST1	HCO3− transport (?)	+	+	H-, L-, VL-cells
	BST2	HCO3− transport (?)	+	+	H-, L-, VL-cells
	BST3	HCO3− transport (?)	+	+	H-, L-, VL-cells
Mitochondria	CCP1	HCO3− transport (?)	+	+	VL-cells
	CCP2	HCO3− transport (?)	+	+	VL-cells

Components with confirmed or proposal involvement in the CCM are shown in bold. n/d—no data.