Type I–III DGKs (α, β, γ, δ, η, κ and ε) have relatively stronger 2-MGK activity than 1-MGK activity.
Type IV DGKs (ζ and ι) only have negligible 1-MGK and 2-MGK activities.
Type V DGK (θ) has stronger 1-MGK activity than 2-MGK activity.
These differences may affect the pathophysiological functions of each DGK isozyme.