CD4
CD4, short for Cluster of Differentiation 4, is a glycoprotein found on the surface of certain immune cells. It acts as a co-receptor for the T cell receptor, facilitating the activation of T cells. CD4 is primarily expressed on helper T cells, but can also be found on other immune cells like macrophages and dendritic cells.
Usage Examples:
As a noun:
- The CD4 count is used as an important indicator of immune system health.
- The CD4 molecule plays a crucial role in immune response.
As an adjective:
- She received a CD4 test to determine the status of her immune system.
- These CD4 cells are crucial for fighting off infections.
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