Phytohemagglutinin (PHA) stimulates which type of cells into division?

Phytohemagglutinin (PHA) is a plant-derived lectin primarily known for its ability to stimulate the division of T-cell lymphocytes. It acts by binding to specific carbohydrates on the surface of these cells, leading to their activation and subsequent proliferation. This property makes PHA a valuable tool in immunological research and clinical applications, especially in studying T-cell responses.

T-cell lymphocytes play a critical role in the immune response, and their activation is essential for various immunological functions, including the response to infections and the destruction of cancer cells. Therefore, the correct choice emphasizes PHA's specific and effective stimulation of T-cells, underscoring the importance of this lectin in research involving cellular immune responses.