摘要:
Disclosed is a process for producing L-threonine which comprises culturing in a medium a microorganism belonging to the genus Escherichia and having resistance to at least one of L-serine and ethionine and an ability to produce L-threonine until L-threonine is accumulated in the culture, and recovering L-threonine therefrom.
摘要:
Disclosed is a process for producing d-isocitric acid which comprises culturing in a medium a microorganism until d-isocitric acid is accumulated in the culture, and recovering d-isocitric acid therefrom, said microorganism belonging to the genus Candida , having resistance to monofluoroacetic acid, being incapable of growing or capable of growing only poorly in the presence of d-isocitric acid as a sole carbon source, and being capable of producing d-isocitric acid.
摘要:
Disclosed is a process for producing L-threonine which comprises culturing in a medium a microorganism belonging to the genus Escherichia and having resistance to at least one of L-serine and ethionine and an ability to produce L-threonine until L-threonine is accumulated in the culture, and recovering L-threonine therefrom.
摘要:
The invention relates to a bacterial process for producing L-tryptophan, L-tyrosine or L-phenylalanine. The process utilizes a coryneform glutamic acid-producing bacterium being capable of producing L-tryptophan, L-tyrosine or L-phenylalanine and also decreased or lacked in phosphoenolpyruvate carboxylase activity. The mutant strain is then cultured in order to accumulate the amino acid in a medium and the amino acid is recovered therefrom.
摘要:
L-histidine is produced by culturing, in a nutrient medium, an L-histidine producing mutant microorganism belonging to the genus Corynebacterium and characterised by a resistance to a precursor for ubiquinone biosynthesis.
摘要:
L-histidine is produced by culturing, in a nutrient medium, an L-histidine producing mutant microorganism belonging to the genus Corynebacterium and characterised by a resistance to a precursor for ubiquinone biosynthesis.