Figure 3.

Immunogold labeling of C. reinhardtii strain 18–7G or wild-type cells grown on acetate. A, Strain 18–7G. B, Wild-type cells. Sections were probed with an antibody raised against C. reinhardtii Rubisco, as described in Methods. Bars indicate 0.5 μm. P, Pyrenoid; and St, chloroplast stroma. No pyrenoids were seen in strain 18–7G, in agreement with previous observations (Rawat et al., 1996).