Cell surface antigen
“A molecule anchored to the outer plasma membrane of a cell that can trigger an immune response or serve as a specific marker for cell identification.”
Synonyms by Register & Formality
Antonyms & Opposites
Nuance Analysis & Word Contrasts
While 'cell surface antigen' is the precise, standard immunological and biological term for molecules on the exterior of a cell capable of provoking an immune response, related terms like 'surface marker' are often preferred in clinical flow cytometry where the immunological immunogenicity is less relevant than the structural identification of cell types. 'Membrane antigen' acts as a seamless near-synonym, slightly de-emphasizing the broad context of the whole cell.
cell surface antigen vs surface marker
While every cell surface antigen can function as a surface marker, the term 'surface marker' is more frequently used in clinical and diagnostic settings focusing on cell identification, whereas 'antigen' emphasizes the molecule's capacity to bind antibodies and provoke immune reactions.
cell surface antigen vs intracellular antigen
A cell surface antigen is exposed on the exterior of the plasma membrane accessible to antibodies in the extracellular fluid, whereas an intracellular antigen resides within the cytoplasm or nucleus and requires cell permeabilization for detection.