CPK21 (calcium-dependent protein kinase 21); calmodulin-dependent protein kinase/ kinase. similar to CPK15 (calcium-dependent protein kinase 15), calmodulin-dependent protein kinase/ kinase [Arabidopsis thaliana] (TAIR:AT4G21940.1); similar to CPK23 (calcium-dependent protein kinase 23), calmodulin-dependent protein kinase/ kinase [Arabidopsis thaliana] (TAIR:AT4G04740.1); similar to CPK9 (CALMODULIN-DOMAIN PROTEIN KINASE 9), calmodulin-dependent protein kinase/ kinase [Arabidopsis thaliana] (TAIR:AT3G20410.1); similar to unnamed protein product [Vitis vinifera] (GB:CAO17935.1); similar to calcium-dependent protein kinase [Solanum lycopersicu