Identification of yeast proteins expressed under radioactive cesium existence

Sakamoto, Fuminori  ; Kozai, Naofumi   ; Onuki, Toshihiko; Tanaka, Kenji

We analyzed the yeast proteins expressed under the presence of Cs-137 by two dimensional electrophoresis to elucidate the mechanism of accumulation of radiocesium by microbes. We specified two proteins expressed specifically, two other proteins increased more, and two proteins decreased more under the condition. We did not observe any change of the protein expression under absence of Cs-137 and the presence of stable cesium isotope, Cs-133. These results indicate that different metabolic systems of yeast function under the above two conditions.