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| Description: Whereas the one-carbon and methyl cycles are found in virtually all cells, liver and kidney possess an additional route for methionine synthesis that involves a different kind of transmethylation. Homocysteine can be remethylated using betaine as the methyl donor in a reaction catalyzed by the cytosolic betaine-homocysteine methyltransferase. Betaine, also known as trimethylglycine, is formed from the mitochondrial oxidation of choline. Picture Stats: Views: 154 Filesize: 46.92kB Height: 245 Width: 773 Source: https://biology-forums.com/index.php?action=gallery;sa=view;id=34780 |