Kinases are a class of enzymes that incorporate a phosphate onto their substrates. The catalytic activity of kinases classifies them as members of which of the following enzyme families?

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Kinases are enzymes that transfer a phosphate group from a donor molecule, such as ATP, to a substrate. This activity classifies them as transferases, which are enzymes that catalyze the transfer of functional groups between molecules.  Kinases are any of the various enzymes that catalyze the transfer of a phosphate group from a donor, such as ADP or ATP, to an acceptor. As such, kinases represent a subfamily of the transferase class of enzyme.

Kinases Are a Class of Enzymes That Incorporate a Phosphate