Surface marker
“A cellular antigen or biological molecule expressed on the plasma membrane that allows for the identification, classification, and isolation of specific cell types.”
Synonyms by Register & Formality
Antonyms & Opposites
Nuance Analysis & Word Contrasts
The term 'surface marker' is predominantly used in immunology, cytology, and hematology to describe molecules on the exterior of a cell that can be detected using antibodies or other binding agents. Choosing 'surface marker' over 'cell surface antigen' usually implies a functional or diagnostic focus—emphasizing how the molecule is used by researchers to identify or sort cell populations, rather than its purely immunological role as an antibody target.
surface marker vs cell surface antigen
While all surface markers are technically antigens if they provoke an immune response, 'surface marker' highlights the utility of the molecule in identifying a cell type, whereas 'antigen' emphasizes its role in immune recognition.
surface marker vs intracellular marker
A surface marker resides on the exterior plasma membrane accessible to extracellular probes without cell permeabilization, whereas an intracellular marker requires cell fixation and permeabilization to be detected.