CD4 + T cells and CD8 + T cells are two important T cells present in the human body. T cells are named because they contain cell-surface proteins that possess specific functions in the intercellular communications are known as cluster of differentiation (CDs) molecules or immunogens or antigens. The cluster of differentiation (CDs) molecules are cell-surface proteins and most of them act as receptors. Each molecule of the CD is assigned a specific number designation and that serves to identify cell phenotypes. Till now, over 300 CDs are identified and characterized.

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Chapter 33.5, Problem 4CC

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CD4⁺ T cells and CD8⁺ T cells are two important T cells present in the human body. T cells are named because they contain cell-surface proteins that possess specific functions in the intercellular communications are known as cluster of differentiation (CDs) molecules or immunogens or antigens. The cluster of differentiation (CDs) molecules are cell-surface proteins and most of them act as receptors. Each molecule of the CD is assigned a specific number designation and that serves to identify cell phenotypes. Till now, over 300 CDs are identified and characterized.

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