|VIP in Human Stomach. VIP was detected in immersion fixed paraffin-embedded sections of human stomach array using Mouse Anti-Human VIP Monoclonal Antibody (Catalog # MAB6079) at 15 µg/mL overnight at 4 °C. Tissue was stained using the Anti-Mouse HRP-DAB Cell & Tissue Staining Kit (brown; Catalog # CTS002) and counterstained with hematoxylin (blue). Lower panel shows a lack of labeling if primary antibodies are omitted and tissue is stained only with secondary antibody followed by incubation with detection reagents. View our protocol for Chromogenic IHC Staining of Paraffin-embedded Tissue Sections.|
Vasoactive intestinal peptide (VIP) is a 28 amino acid (aa) peptide that exerts wide-ranging effects in embryonic and adult tissues through interactions with the 7‑transmembrane spanning receptors VIP R1 and VIP R2. The VIP proprotein is proteolytically processed to release bioactive VIP as well as the bioactive peptides PHV and PHM. VIP regulates appetite and feeding behavior and stimulates insulin and glucagon secretion in pancreatic islet cells. It also regulates astrocyte function, multiple aspects of cardiac function, and TLR function in innate immune responses. Mature VIP shares 100% aa sequence identity with mouse and rat VIP.
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