Some Effects of Ionizing Radiation on Methionine Sulfonium Compounds

The production of 15N‐labelled S‐adenosylmethionine and adenine by yeast biosynthesis

“…With yields of 3 to 4 g of moist cells after the culture period, ir is obvious that growth is limited under the experimental conditions. Gamma-irradiated yeast (1 Mrad), which is non-viable as judged by the inability to form colonies after plating, still shows high metabolic activity as evidenced by undiminished synthesis of S-AM (see also (20)). The somewhat higher yield of cell centrifugate from irradiated yeast may indicate a difference in hydration.…”