Histone H3 Lysine 4

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

**Definition:** The lysine residue found at amino acid position 4 in the histone H3 protein. Methylation of this residue may be a marker for transcriptionally active genes.

**Synonyms:** - H3K4 - Histone H3 Dimethyl Lys5 - Histone H3 Lys4 - Histone H3 Lysine 5 - Lysine 4 of Histone H3