Detection of Histamine H1 R in U937 human histiocytic lymphoma cell line activated with PMA by Flow Cytometry. U937 human histiocytic lymphoma cell line, resting (A) or (B) activated with PMA, was stained with Mouse Anti-Human Histamine H1 R PE‑conjugated Monoclonal Antibody (Catalog # FAB4726P, filled histograms) or isotype control antibody (Catalog # IC002P, open histograms). View our protocol for Staining Membrane-associated Proteins. |
Histamine H1 R (HRH1) is a 60 kDa, 487 aa G-protein coupled 7-transmembrane putative glycoprotein. It is implicated in the pathogenesis of asthma and is a major pharmaceutical target for antihistamines. It has been detected as a mixture of monomers and homodimers, with highest concentration in the placenta, followed by brain, lung (produced by airway smooth muscle, bronchial epithelium and macrophages) and other tissues. Extracellular domains of human HRH1 share 72% aa sequence identity with corresponding regions of mouse or rat HRH1.
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