※ STE7 family introduction

    STE7 (MAP2K, MEK) kinases participate in the MAPK signaling cascades, STE7s are activated by STE11 and subsequent mediate the phosphorylation of MAPK kinases. STE7 are typical dual-specificity kinases and can phosphorylate the conserved TxY motif on MAPK. STE7 can further be classified into five subclasses: MEK1, MEK3, MEK4, MEK5 and MEK7 (1).

Reference
1. Wikinome Annotation:   Kinase Family STE7