Effects of Mg2+, MoO42- on Key Enzymes in Metabolism of Xanthomonas campestris

Abstract

Abstract: In this paper, the key enzymes glucose-6-phosphate dehydrogenase and pyruvate kinase were researched in the metabolism of xanthan gum by Xanthomonas campestris, Mg2+ and MoO42- in different concentrations were added into the reaction to explore the dynamic relationship between the fermentation time and the activities of key enzymes. The results showed that 0.5g/50ml Mg2+ in the fermentation mixture notably improved the activities of glucose-6-phosphate dehydrogenase while 0.20g/50ml MoO42- appreciably improved the activities of pyruvate kinase. The conclusion indicates that magnesium and molybdenum can obviously modulate G-6-PDH and PYK in Xanthomonas campestris respectively.

Key words: Xanthomonas campestris, glucose-6-phosphate dehydrogenase, pyruvate kinase, Mg2+, MoO42-

CHEN Yong-Hong, LI Bai-Lin, 欧Jie , TIAN Wen-Bo. Effects of Mg2+, MoO42- on Key Enzymes in Metabolism of Xanthomonas campestris[J]. FOOD SCIENCE, 2007, 28(10): 417-420.

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Effects of Mg2+, MoO42- on Key Enzymes in Metabolism of Xanthomonas campestris

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