Histone H3 Trimethyl Lys9

**Semantic type:** Amino Acid, Peptide, or Protein

**Definition:** A post-translationally modified form of histone H3 where the lysine residue at position 9 is trimethylated. This modification is associated with heterochromatin formation and plays a role in embryonic stem cell lineage commitment and maintenance of lineage fidelity.

**Synonyms:** - H3K9me3 - H3K9me3 - Histone H3 Trimethyl Lys10 - Histone H3 Trimethyl Lysine 10 - Histone H3 Trimethyl Lysine 9