| Popis: |
In the presence of methanol at concentrations up to 12% by volume, photosynthetic fixation of C14O2 into glycolic acid, glycine, alanine, serine, and an unknown compound proceeds at nearly normal rates over periods of 1 to 8 minutes. However, fixation into other compounds, such as phosphoglyceric, phosphopyruvic, and aspartic acids and the lipids, is suppressed over induction periods of several minutes. The results indicate that methanol inhibits the photosynthetic cycle, thus unmasking an alternative path of fixation into the simple acids. It is suggested that the initial step is the carboxylation of phosphoenolpyruvic acid. |
