The Lysine 65 Residue in HIV-1 Reverse Transcriptase Operate and in Nucleoside Analog Drug Resistance. Eat more protein and particularly extra minimally processed foods. Methylation been discovered on a variety of lysine residues in numerous histones: K4 (utilizing the only-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 A number of proteins chargeable for the methylation of specific residues have been characterised, and all but one in all these accommodates a SET domain