Figure 5.

Western blots showing levels of LSU, FBPase, and SBPase. Leaves sampled are as described in the legend for Figure 2. For each N and cutting treatment, proteins extracted from each pCO₂ treatment and for each replicate block were separated by SDS-PAGE and blotted. Because of variation in exposure time, chemiluminescence, and the reaction of a given protein with its antibody, comparisons are only possible within a blot. This allows for a comparison between pCO₂ treatments and any N or cutting treatment, but does not allow for a comparison between N and cutting treatments, except when standardized as a proportion of the control, as in Figure 6.