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The Interleukin-1 alpha (IL-1 a)1 is a α- or alpha protein sometimes glycoprotein present in blood.
The Interleukin-1 family (IL-1 family) is a group of 11 cytokines, which plays a central role in the regulation of immune and inflammatory responses to infections or sterile insults. Rec. E. coli interleukin-1 for cell culture or antibody production.