The Menin protein is an important component of the MLL/SET1 HMT complex, which methylates “Lys-4” of histone H3. It acts as a transcriptional regulator, inhibiting telomerase expression and inhibiting cell proliferation through TGFB1. Menin Protein, Human (His) is the recombinant human-derived Menin protein, expressed by E. coli , with N-6*His labeled tag.