Methylation been found on a variety of lysine residues in numerous histones: K4 (using the single-letter amino-acid code for legal professional lysine), K9, K27, K36 and K79 in histone H3, K20 in histone H4, lawyer in my area K59 in the globular area of histone H4 2 and solicitors K26 of histone H1B three A number of proteins answerable for the methylation of particular residues have been characterized, and all but certainly one of these comprises a SET area