The conserved MAPK module includes three kinases that establish a sequential activation pathway comprising a MAPK , MAPK kinase ( MKK ) and MAPK kinase kinase ( MKKK ) .
MAPK途径的基本组合包括MAPK、MAPK激酶（MKK）和MAPK激酶激酶（MKKK）三种保守的成分，由此建立一个连续的激活途径。
mkk