Complex sentence: Casein kinase 1 epsilon, and related casein kinase 1 delta, is dephosphorylated in this pathway, likely by Protein Phosphatase 2 (PP2A), which increases both the enzymes' kinase activity in vivo.
Split into simpler sentences: Casein kinase 1 epsilon, and related casein kinase 1 delta, is dephosphorylated in this pathway. Dephospho rylation of casein kinase 1 epsilon is likely achieved by Protein Phosphatase 2 (PP2A), which increases both the enzymes' kinase activity in vivo.