MAP Kinase Kinase 1

**Definition:** An abundant 43-kDa mitogen-activated protein kinase kinase subtype with specificity for MITOGEN-ACTIVATED PROTEIN KINASE 1 and MITOGEN-ACTIVATED PROTEIN KINASE 3.

**Tree numbers:** - D08.811.913.696.620.682.700.565.100 - D08.811.913.696.620.682.725.200.100 - D12.776.476.563.565.100 - D12.776.476.568.200.100

**Synonyms:** - MKK1 Protein Kinase - MEK1 Protein Kinase - Mitogen-Activated Protein Kinase Kinase 1 - MKK-1 Protein Kinase - MEK-1 Protein Kinase - MAPK Kinase 1 - MAP2K1 Protein