Amino acid leakage and amino acid pool levels of ultraviolet-irradiated yeast cells

A study was made of the effect of ultraviolet radiations on leakage of amino acids from yeast cells and on the amino acid pools of these cells. Results are tabulated. The significance ot the findings is discussed. Leakage of amino acids from yeast cells following ultraviolet radiation is concluded to be a selective process influenced by the metabolic activity of the cell. Membrane damage probably occurs but it alone cannot account for the observed facts. (C.H.)