What is AP 1 in Molecular Biology?

Learn AP 1 definition in molecular biology with explanation to study “What is AP 1”. Study ap 1 explanation with molecular biology terms to review molecular biology course for online degree programs.

AP 1 Definition

  • A transcription activator composed of one molecule each of Fos and Jun. Mediates response to the mitogenic phorbol esters..

    Molecular Biology by Robert F. Weaver



AP 1 Explanation

AP-1 stands for the Activator protein 1, which is a transcription activator that regulates the expression of genes, in response to stimuli like stress, growth factors, cytokines and infections. It is made up of one molecule each of Jun and Fos. AP - 1 controls a variety of cellular level processes like proliferation, apoptosis and differentiation.

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