Figure 5.

Changes in the photosynthetic activities of SNC1 after a shift to PG-free medium. Wild-type cells were grown in the absence of PG, while SNC1 cells, pregrown with PG supplementation, were shifted to PG-free medium. The precultured cells were divided into three cultures for independent measurements of the photosynthetic activity with NaHCO₃ as an electron acceptor (circle, triangle, and square) on a Chl basis (a), or on a per-cell basis (b). Photosynthetic activity per cell (b) was normalized to the respective maximal values. Open symbols, wild type; filled symbols, SNC1.