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Lloyd J. Old identified the first cell surface antigens that could differentiate among different cell types.
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Lloyd J. Old
20th-century American immunology researcher
Lloyd John Old was an American medical researcher, and one of the founders of the field of cancer immunology. When Old began his career in 1958, tumor immunology was in its infancy. Today, cancer immunotherapies are a significant advance in cancer therapy.Source: Wikipedia (CC BY-SA)
Cell membrane
Biological membrane that separates the interior of a cell from its outside environment
The cell membrane is a biological membrane that separates and protects the interior of a cell from the outside environment. The cell membrane is a lipid bilayer, usually consisting of phospholipids and glycolipids; eukaryotes and some prokaryotes typically have sterols…Source: Wikipedia (CC BY-SA)
Antigen
Molecule triggering an immune response (antibody production) in the host
In immunology, an antigen (Ag) is a molecule, moiety, foreign particulate matter, or an allergen, such as pollen, that can bind to a specific antibody or T-cell receptor. The presence of antigens in the body may trigger an immune response.Source: Wikipedia (CC BY-SA)
Cell type
Metaclass used to distinguish between cell forms
A cell type is a classification used to identify cells that share morphological or phenotypical features. A multicellular organism may contain cells of a number of widely differing and specialized cell types, such as muscle cells and skin cells, that differ both in appearance…Source: Wikipedia (CC BY-SA)