Figure 3.

Induction of mtCA under different light intensities. A, The relative amount of mtCA mRNA after transfer to low-CO₂ conditions for 15 (▴), 30 (•), and 60 (▪) min under different light intensities. All lanes on the northern blot contained 5 μg of total RNA. B, Western blot of mtCA after 2 h of induction to low-CO₂ conditions under different light intensities. The light intensities were: lane 1, 25; lane 2, 75; lane 3, 150; lane 4, 300; lane 5, 450; and lane 6, 1200 μmol m⁻² s⁻¹. All lanes contained 0.5 μg of protein.