transaminase: a class of transferases that catalyze transamination (that transfer an amino group from an amino acid to another compound)
transferase: any of various enzymes that move a chemical group from one compound to another compound
releasing hormone: any of several hormones produced in the hypothalamus and carried by a vein to the anterior pituitary gland where they stimulate the release of anterior pituitary hormones; each of these hormones causes the anterior pituitary to secrete a specific hormone