With the recent exposé of fish mislabeling in Los Angeles this past April, the FDA has grow to be more conscious how rampant the practice of food misrepresentation is. Methylation been found on a variety of lysine residues in various histones: K4 (utilizing the one-letter amino-acid code for lysine), K9, K27, K36 and K79 in histone H3, K20 in histone H4, K59 in the globular domain of histone H4 2 and K26 of histone H1B three A number of proteins accountable for the methylation of specific residues have been characterized, and all however one of these comprises a SET domain