An enzyme that acts as a catalyst for joining two molecules.
SYN: SEE: synthetase

ATP synthase

An enzyme that catalyzes the addition of a phosphate group to adenosine diphosphate to produce adenosine triphosphate.

nitric oxide synthase

ABBR: NOS An enzyme that synthesizes nitric oxide from arginine; present in the central nervous system, the lining of blood vessels, the heart, joints, some autonomic neurons, and other organs.

prostaglandin endoperoxide synthase

SEE: Cyclooxygenase.

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