mutase

n.
An enzyme that catalyzes the shifting of a chemical group from one position to another within the same molecule.

[Latin mūtāre, to change, move; see mutate + -ASE.]

(myū'tās, -tāz)
n.

Any enzyme that catalyzes the rearrangement of atoms within a molecule, especially one that causes the transfer of a phosphate group from one carbon atom to another.

Any of a group of enzymes (transferases) that catalyze the intramolecular shifting of a chemical group from one position to another.

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