Traduction et analyse de mots par intelligence artificielle ChatGPT
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- comment le mot est utilisé
- fréquence d'utilisation
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- exemples d'utilisation (plusieurs phrases avec traduction)
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Qu'est-ce (qui) est lack expression - définition
![DNA methylation is the addition of a [[methyl]] group to the DNA that happens at [[cytosine]]. The image shows a cytosine single ring base and a methyl group added on to the 5 carbon. In mammals, DNA methylation occurs almost exclusively at a cytosine that is followed by a [[guanine]].](https://commons.wikimedia.org/wiki/Special:FilePath/DNA methylation.svg?width=200 "DNA methylation is the addition of a [[methyl]] group to the DNA that happens at [[cytosine]]. The image shows a cytosine single ring base and a methyl group added on to the 5 carbon. In mammals, DNA methylation occurs almost exclusively at a cytosine that is followed by a [[guanine]].")
![hunchback]]. High intensity of blue color marks places with high hunchback mRNA quantity.](https://commons.wikimedia.org/wiki/Special:FilePath/Hunchback in situ.jpg?width=200 "hunchback]]. High intensity of blue color marks places with high hunchback mRNA quantity.")
![[[Neomycin]] is an example of a small molecule that reduces expression of all protein genes inevitably leading to cell death; it thus acts as an [[antibiotic]].](https://commons.wikimedia.org/wiki/Special:FilePath/Neomycin B C.svg?width=200 "[[Neomycin]] is an example of a small molecule that reduces expression of all protein genes inevitably leading to cell death; it thus acts as an [[antibiotic]].")
![transcription start site]] of the gene. The loop is stabilized by one architectural protein anchored to the enhancer and one anchored to the promoter and these proteins are joined to form a dimer (red zigzags). Specific regulatory [[transcription factor]]s bind to DNA sequence motifs on the enhancer. General transcription factors bind to the promoter. When a transcription factor is activated by a signal (here indicated as [[phosphorylation]] shown by a small red star on a transcription factor on the enhancer) the enhancer is activated and can now activate its target promoter. The active enhancer is transcribed on each strand of DNA in opposite directions by bound RNAP IIs. Mediator (a complex consisting of about 26 proteins in an interacting structure) communicates regulatory signals from the enhancer DNA-bound transcription factors to the promoter.](https://commons.wikimedia.org/wiki/Special:FilePath/Regulation of transcription in mammals.jpg?width=200 "transcription start site]] of the gene. The loop is stabilized by one architectural protein anchored to the enhancer and one anchored to the promoter and these proteins are joined to form a dimer (red zigzags). Specific regulatory [[transcription factor]]s bind to DNA sequence motifs on the enhancer. General transcription factors bind to the promoter. When a transcription factor is activated by a signal (here indicated as [[phosphorylation]] shown by a small red star on a transcription factor on the enhancer) the enhancer is activated and can now activate its target promoter. The active enhancer is transcribed on each strand of DNA in opposite directions by bound RNAP IIs. Mediator (a complex consisting of about 26 proteins in an interacting structure) communicates regulatory signals from the enhancer DNA-bound transcription factors to the promoter.")
![pigmentation]] genes in different areas of the [[skin]].](https://commons.wikimedia.org/wiki/Special:FilePath/Tortie-flame.jpg?width=200 "pigmentation]] genes in different areas of the [[skin]].")
Wikipédia
David Lambert Lack FRS (16 July 1910 – 12 March 1973) was a British evolutionary biologist who made contributions to ornithology, ecology, and ethology. His 1947 book, Darwin's Finches, on the finches of the Galapagos Islands was a landmark work as were his other popular science books on Life of the Robin and Swifts in a Tower. He developed what is now known as Lack's Principle which explained the evolution of avian clutch sizes in terms of individual selection as opposed to the competing contemporary idea that they had evolved for the benefit of species (also known as group selection). His pioneering life-history studies of the living bird helped in changing the nature of ornithology from what was then a collection-oriented field. He was a longtime director of the Edward Grey Institute of Field Ornithology at the University of Oxford.
