Methylation been found on a range of lysine residues in numerous histones: K4 (using the single-letter amino-acid code for lysine), K9, K27, K36 and solicitor uk K79 in histone H3, K20 in histone H4, K59 within 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 characterised, solicitor uk and all but considered one of these contains a SET domain