## Abstract Measuring the specific enzyme activity in cells of __Proteus rettgeri__ it was shown that urease formation is controlled by repression through ammonia. Derepressed synthesis of the enzyme, as initiated by the absence of ammonia, required an external nitrogen source, which may not only b
Regulation of lipid biosynthesis in Chlorella kessleri by clomiphene
✍ Scribed by Dr. T. Řezanka; K. Lívanský; M. Podojil
- Publisher
- John Wiley and Sons
- Year
- 1985
- Tongue
- English
- Weight
- 307 KB
- Volume
- 25
- Category
- Article
- ISSN
- 0233-111X
No coin nor oath required. For personal study only.
✦ Synopsis
During autotrophic cultivation of the alga Chlorella kassleri clorniphene') regulated both the quantitative and qualitative production of lipids (sterols. hydrocarbons and fatty acids). Their content decreased to 57% as compared with the produrtion of sterols in cultures without clomiphene. The production of hydrocarbons and fatty acids was similar to that on the control.
Among the sterols the variety of which enhanced the presence of clomiphene, those prevailed which carried either a double bond in position 8 or were devoid of i t in position 22. In the mixture of hydrocarbons a significant increase was observed towards n-heptadecane production. Oleic acid predominated among fatty acids.
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