When the Heinong 35, Hefeng 35, and Hefeng 25 were precultured for about 24 hours, and the infection time were 20min, 25min, 20min respectively, and the co-culture time were 70 hours, 80 hours, 70 hours, the GUS transient repression were the highest with 25.00%, 21.80%, 23.81%.
Repression of marrow was light.
An investigation into undergraduates' repression
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This response is characterized by a general transient repression of genes coding for components of photosynthetic systems and of other light-regulated genes.
Exogenous cyclic adenosine monophosphate (AMP) did not overcome the glucose inhibition of lactose utilization but did relieve the transient repression.
The addition of glucose to a 3300 culture grown in lactose immediately caused a permanent inhibition of lactose utilization and only a mild transient repression of β-galactosidase.
Without iron, glucose addition results in only a small and transient repression, but this is fully reversible by cAMP.
A transient repression of arginine enzyme synthesis was observed only when the cell extract of a repressible strain was added, not by the extract of a nonrepressible strain.