<unk>  is an epigenetic modification to the DNA packaging protein histone H4. It is a mark that indicates the acetylation at the 12th lysine residue of the histone H4 protein.<unk>  is involved in learning and memory. It is possible that restoring this modification could reduce age-related decline in memory.
H4K12ac
H4K8ac
H4K91ac
H4K5ac
H3K9ac
H3K14ac
H3K23ac
H3K36ac