An enzyme that catalyzes the addition of a phosphate group from ATP to another molecule is called a:

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A kinase is an enzyme that catalyzes the addition of a phosphate group from ATP to another molecule. This process is called phosphorylation. A phosphatase, on the other hand, catalyzes the removal of a phosphate group from a molecule. A phosphorylase is an enzyme that catalyzes the addition of a phosphoryl group from an inorganic phosphate to an acceptor molecule, not from ATP. A cyclase catalyzes the cleavage or synthesis of a cyclic compound.

An Enzyme That Catalyzes the Addition of a Phosphate Group