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Command Decision is a 1949 war film released by Metro-Goldwyn-Mayer starring Clark Gable, Walter Pidgeon, Van Johnson, and Brian Donlevy, and directed by Sam Wood, based on the 1948 stage play of the same name written by William Wister Haines, which he based on his best-selling 1947 novel.
The inducer in the lac operon is allolactose. [2] If lactose is present in the medium, then a small amount of it will be converted to allolactose by a few molecules of β-galactosidase that are present in the cell. [3] Allolactose binds to the repressor and decreases the repressor's affinity for the operator site. [3]
Command Decision was a 1948 play in three acts written by William Wister Haines, and formed the basis for his best-selling novel of the same title. Produced by Kermit Bloomgarden and directed by John O'Shaughnessy, it ran for 409 performances from October 1, 1947, to September 18, 1948, at the Fulton Theatre in New York City .
Toggle switch which operates using two mutually inhibitory genes, each promoter is inhibited by the repressor that is transcribed by the opposing promoter. Toggle switch design: Inducer 1 inactivates repressor 1, which means repressor 2 is produced. Repressor 2, in turn, stops transcription of the repressor 1 gene and the reporter gene. [14]
The gab operon comprises three structural genes – gabD, gabT and gabP – that encode for a succinate semialdehyde dehydrogenase, GABA transaminase and a GABA permease respectively. There is a regulatory gene csiR, downstream of the operon, that codes for a putative transcriptional repressor [1] and is activated when nitrogen is limiting.
The lac operon in the prokaryote E. coli consists of genes that produce enzymes to break down lactose. Its operon is an example of a prokaryotic silencer. The three functional genes in this operon are lacZ, lacY, and lacA. [6] The repressor gene, lacI, will produce the repressor protein LacI which is under allosteric regulation.
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The trp operon consists of a regulatory gene, a promoter, an operator, and a terminator. The trp operon is active only when cellular tryptophan is scarce. If there isn't enough tryptophan, the repressor protein breaks off from the operator (where the repressor is normally bound) and RNA polymerase can complete its reading of the strand of DNA ...
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