Lymphotoxin (also known as tumor necrosis factor-beta) is a lymphokine cytokine.
It is a protein that is produced by "killer" CD8+ T cells that kill the virally infected cells by producing holes in the cell's cell membrane.
See also
Lymphotoxin is homologous to Tumor Necrosis Factor beta, but secreted by T-cells. It is paracrine due to the small amounts produced. The effects are similar to TNF-alpha, but TNF-beta is also important for the development of lymphoid organs.
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