Biological Activity: Fully biologically active when compared to standard. The ED50 as determined by a cell proliferation assay using PHA-activated human T lymphoblasts is less than 0.05 ng/mL, corresponding to a specific activity of > 2.0 x 107 IU/mg.
Relevance: Cytokine that can act as a growth factor for activated T and NK cells, enhance the lytic activity of NK/lymphokine-activated Killer cells, and stimulate the production of IFN-gamma by resting PBMC. Synonyms: IL-12A, CLMF p35, IL-12 subunit p35, NK cell stimulatory factor chain 1, NKSF1