The ProPoints system is simpler to follow for some than calorie counting and fewer restrictive than other plans. 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 K79 in histone H3, K20 in histone H4, solicitor law firms K59 in the globular domain of histone H4 2 and K26 of histone H1B three A number of proteins accountable for the methylation of particular residues have been characterized, and all but one in every of these incorporates a SET domain