抄録
1. Conditions for the respiratory adaptation of Saccharomyces cerevisiae were examined, and show that respiratory adaptation of yeast depends on the concentration of glucose and the amount of organisms in the aeration medium.
2. The addition of 100 μg/ml of the toxohormone-like substances from the cancer tissue and RD mutant of yeast showed partially depressing effects on the respiratory adaptation of catalase in yeast, while the toxohormone-like substances from normal yeast showed no effect.
3. Other peptide-containing substances except the toxohormone-like substances did not show any activity to depress the respiratory adaptive production of catalase in yeast, and we confirmed that the activities of the toxohormone-like substances to catalase were specific.
