WikiBiomeThe human microbiome encyclopediaRanked matches across titles, topics, categories, and article introductions.
A transition metal that is essential to human health exclusively as a component of cobalamin (vitamin B12), but toxic at higher levels of exposure. Cobalt occupies a distinctive position in metal biology: it is the only metal whose essential biological function in mamma…
Methylation is the addition of a methyl group (-CH₃) to DNA, histones, proteins, or small molecules. DNA methylation (at CpG sites) is the primary epigenetic mechanism silencing gene expression, and it requires the methyl donor S-adenosylmethionine (SAMe), which depends…