SummaryThe growth of the nonsulfur photosynthetic bacterium Rhodopseudomonas gelatinosa was: investigated as a possible way to produce single-cell protein from agricultural by-products. Of the various raw materials examined as potential feedstocks, wheat bran infusion was selected as the substrate for mass culture and continuous cultivation studies. Harvested photosynthetic cells contained approximately 65.0y' crude protein and 5.1% nucleic acid (RNA). The amino acid content of harvested photosynthetic proteins was comparable with conventional proteins of plant and animal origin.
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