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<br>Methylation been discovered on a spread of lysine residues in numerous histones: K4 (utilizing the [one-letter amino-acid](https://graficatotal.mx/hola-mundo/) code for lysine), K9, K27, K36 and K79 in histone H3, K20 in histone H4, K59 in the globular domain of histone H4 2 and K26 of histone H1B 3 A number of proteins answerable for the methylation of particular residues have been characterized, and all however one among these comprises a SET domain |