receptor protein

re·cep·tor pro·tein

an intracellular protein (or protein fraction) that has a high specific affinity for binding a known stimulus to cellular activity, such as a steroid hormone or adenosine 3',5'-cyclic phosphate.

re·cep·tor pro·tein

(rĕ-sep'tŏr prō'tēn) An intracellular protein (or protein fraction) that has an affinity for a known stimulus to cellular activity, such as a steroid hormone or adenosine 3',5'-cyclic phosphate.