Phosphorylation of MEK4 by MEKK1 (Dictyostelium discoideum)
phosphorylation of mek4 by mekk1 (dictyostelium discoideum)
Phosphorylation of MEK4 by MEKK1 (Dictyostelium discoideum)
phosphorylation of mek4 by mekk1 (dictyostelium discoideum)