Rabbit polyclonal antibody to c~Jun (Ab~91)

c~Jun is a member of the Jun family containing c~Jun, JunB, and JunD, and is a component of the transcription factor activator protein~1 (AP~1). AP~1 is composed of dimers of Fos, Jun, and ATF family members and binds to and activates transcription at TRE/AP~1 elements (reviewed in 1). Extracellular signals, including growth factors, chemokines, and stress, activate AP~1~dependent transcription. The transcriptional activity of c~Jun is regulated by phosphorylation at Ser63 and Ser73 through SAPK/JNK (reviewed in 2). Knockout studies in mice have shown that c~Jun is essential for embryogenesis, and subsequent studies have demonstrated roles for c~Jun in various tissues and developmental processes, including axon regeneration, liver regeneration, and T cell development. AP~1 regulated genes exert diverse biological functions, including cell proliferation, differentiation, and apoptosis, as well as transformation, invasion and metastasis, depending on cell type and context. Other target genes regulate survival, as well as hypoxia and angiogenesis. Research studies have implicated c~Jun as a promising therapeutic target for cancer, vascular remodeling, acute inflammation, and rheumatoid arthritis.