EXTRACELLULAR ORGANIC NITROGEN IN USTILAGO MAYDIS FERMENTATION BROTHS
1956 ◽
Vol 34
(6)
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pp. 1195-1198
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Keyword(s):
Free amino acids and small peptides make up most of the extracellular organic nitrogen in media from shaken and aerated Ustilago maydis fermentations. Of the 3.5 mgm./ml. ammonia nitrogen added, 2.9 mgm./ml. remained in the extracellular broth. This extracellular nitrogen contained 1.17 mgm./ml. of organic nitrogen and 1.74 mgm./ml. of residual ammonia nitrogen. At least 53% of extracellular organic nitrogen is in the form of free amino acids. Fifteen amino acids were estimated quantitatively in acid-hydrolyzed broth and a particularly high level of arginine (1.14 mgm./ml.) was found. The amounts of methionine and tryptophan in the broth were quite low but the lysine concentration 0.400 mgm./ml. was relatively high.
1956 ◽
Vol 34
(1)
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pp. 1195-1198
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1978 ◽
Vol 58
(3)
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pp. 719-730
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1976 ◽
Vol 43
(1)
◽
pp. 97-107
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1968 ◽
Vol 128
(3)
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pp. 517-532
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Keyword(s):
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