monoclonal antibody: any of a class of antibodies produced in the laboratory by a single clone of cells or a cell line and consisting of identical antibody molecules
antibody: any of a large variety of proteins normally present in the body or produced in response to an antigen which it neutralizes, thus producing an immune response
reticular formation: a complex neural network in the central core of the brainstem; monitors the state of the body and functions in such processes as arousal and sleep and attention and muscle tone