The phrase eating regimen" was used to mean Prescribed course of food, restricted in variety or limited in amount, esp. Methylation been discovered on a range of lysine residues in numerous histones: K4 (utilizing the one-letter amino-acid code for lysine), K9, K27, K36 and K79 in histone H3, K20 in histone H4, K59 within the globular area of histone H4 2 and K26 of histone H1B three Several proteins responsible for the methylation of specific residues have been characterized, and all but considered one of these incorporates a SET domain