Methylation been discovered on a variety of lysine residues in various histones: K4 (utilizing the single-letter amino-acid code for lysine), K9, K27, K36 and solicitor news K79 in histone H3, K20 in histone H4, K59 in the globular area of histone H4 2 and K26 of histone H1B three Several proteins liable for the methylation of specific residues have been characterised, and all but certainly one of these comprises a SET domain