A specific structure or site on the cell surface or within its cytoplasm that recognizes and binds with other specific molecules. These include the proteins on the surface of an immunocompetent cell that binds with antigens, or proteins found on the surface molecules that bind with hormones or neurotransmitters and react with other molecules that respond in a specific way. Ex. Adenosine A2 Receptor; Antigen p150,95; T-Cell Receptors alpha-Chain.
(=> (Receptor ?Self)
(And (Exists (?A)
(And (Constituent-Material-Of ?Self ?A)
(Or (Cell-Wall ?A) (Cytoplasm ?A))))
(Minimum-Slot-Cardinality ?Self Recognizes 1)
(Minimum-Slot-Cardinality ?Self Binds-With 1)))