Biomethylation | Wikipedia audio article
Channel: wikipedia tts
Date: 30/12/2018

This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Methylation


00:01:05 1 In biology
00:01:57 1.1 Methanogenesis
00:02:30 1.2 O-Methyltransferases
00:03:04 1.3 5-O-methylations
00:03:40 1.4 Methionine synthase
00:05:20 1.5 Heavy metals: arsenic, mercury, cadmium
00:06:19 1.6 Epigenetic methylation
00:06:28 1.6.1 DNA/RNA methylation
00:09:26 1.6.2 Protein methylation
00:10:46 2 In chemistry
00:11:07 2.1 Electrophilic methylation
00:12:21 2.2 Eschweiler-Clarke methylation
00:12:47 2.3 Diazomethane and trimethylsilyldiazomethane
00:13:32 2.4 Nucleophilic methylation
00:14:22 3 See also
00:14:31 3.1 Biology topics
00:15:05 3.2 Organic chemistry topics



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SUMMARY
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In the chemical sciences, methylation denotes the addition of a methyl group on a substrate, or the substitution of an atom (or group) by a methyl group. Methylation is a form of alkylation, with a methyl group, rather than a larger carbon chain, replacing a hydrogen atom. These terms are commonly used in chemistry, biochemistry, soil science, and the biological sciences.
In biological systems, methylation is catalyzed by enzymes; such methylation can be involved in modification of heavy metals, regulation of gene expression, regulation of protein function, and RNA processing. In vitro methylation of tissue samples is also one method for reducing certain histological staining artifacts. The counterpart of methylation is called demethylation.