Histone H3 Lysine 9

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

**Definition:** The lysine residue found at amino acid position 9 in the histone H3 protein. Methylation of this residue may be a marker for transcriptionally repressed genes.

**Synonyms:** - H3K9 - Histone H3 Lys10 - Histone H3 Lys9 - Histone H3 Lysine 10 - Lysine 9 of Histone H3