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Determination of chromium combinated with DNA,RNA and protein in chromium-rich brewer's yeast

DING Wenjun;QIAN Qinfang;HOU Xiaolin;FENG Weiyue;CHAI Zhifang (Institute of High Energy Physics. the Chinese Academy of Sciences, Beijing 100080) WANG Ke (Chinese Institute of Atomic Energy, Beijing 102413)  
The contents of chromium in the DNA, RNA and protein fractions separated from chromium-rich and normal brewer's yeast were determined with the neutron activation analysis in order to study the combination of Cr with DNA, RNA and protein in chromium-rich brewer's yeast. Our results showed that the extracting rats and concentrations of DNA, RNA and protein had no significant difference in two types of yeast, but the chromium contents of DNA, RNA and protein in the chromium-rich yeast were significantly higher than those in the normal. In addition, the content of chromium in DNA was much higher than that in RNA and protein, which indicated that the inorganic chromium compounds entered into the yeast cell, during the yeast cultivation in the culture medium containing chromium were converted into organic chromium compounds combined with DNA, RNA and protein.
【Fund】: 国家自然科学基金“八五”重大项目!19392100;; 中国科学院重大项目!21039751
【CateGory Index】: Q78
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