Anti-MAP2K4 (phospho S80) Antibody - Identical to Abcam (ab39403)

This rabbit polyclonal IgG antibody from Antibodies.com specifically recognizes MAP2K4 (also known as MKK4 or JNKK1) only when phosphorylated at serine 80, a site associated with kinase activation within the stress-activated JNK and p38 MAPK signaling cascades. Produced in rabbit and supplied as an unconjugated reagent in a 100 µl volume, it is validated for Western blot, immunohistochemistry, and immunofluorescence applications. Cross-reactivity has been demonstrated against human, mouse, and rat samples, supporting comparative studies across these species. Because the antibody recognizes the phosphorylated epitope rather than total MAP2K4 protein, it is appropriate for tracking activation-state changes following cellular stress, cytokine stimulation, or apoptotic challenge in research use only workflows. The reagent matches the characterized Abcam reference ab39403 in specificity, providing a reproducible tool for investigating JNK pathway signaling.