Fig. 7.

Cost (10⁶ molecules ATP embryo⁻¹ s⁻¹) and flux (10⁶ substrate molecules embryo⁻¹ s⁻¹) (means ± s.d.) for the transporter substrates CAM (A), BFLV (B) and CROAM (C). The regression line in A is a linear extrapolation of the first three CAM concentrations.