{"product_id":"anti-human-histamine-h4-receptor-hrh4-extracellular-antibody-bha21300537","title":"Anti-Human Histamine H4 Receptor (HRH4) (extracellular) Antibody","description":"\u003ch2\u003eOverview\u003c\/h2\u003e \u003cp\u003eAnti-Human Histamine H4 Receptor (HRH4) (extracellular) Antibody is an antibody targeting H4R, HH4R, G-protein coupled receptor 105, GPCR105, GPRv53, AXOR35 Polyclonal raised in Rabbit (Unconjugated). This antibody is commonly used in IFC, LCI, WB to detect, localize, or compare expression of the target across samples.\u003c\/p\u003e  \u003ch2\u003eKey elements and design rationale\u003c\/h2\u003e \u003cul\u003e   \u003cli\u003e\n\u003cstrong\u003eTarget:\u003c\/strong\u003e H4R, HH4R, G-protein coupled receptor 105, GPCR105, GPRv53, AXOR35 (also reported as H4R, HH4R, G-protein coupled receptor 105, GPCR105, GPRv53, AXOR35).\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eImmunogen\/epitope region:\u003c\/strong\u003e 1st extracellular loop.\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eHomology note:\u003c\/strong\u003e Won't recognize rat or mouse H4 Histamine Receptor (informative for cross-species interpretation).\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eSpecies reactivity (as provided):\u003c\/strong\u003e Human.\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eCited use:\u003c\/strong\u003e IFC (literature use does not guarantee performance in every setup).\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eLot quality control (as provided):\u003c\/strong\u003e Western blot analysis.\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003ePeptide confirmation:\u003c\/strong\u003e Confirmed by amino acid analysis and mass spectrometry.\u003c\/li\u003e   \u003cli\u003e\n\u003cstrong\u003eBlocking peptide:\u003c\/strong\u003e Available for antigen preadsorption control where appropriate.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eThese attributes help researchers interpret whether signal reflects the intended target in a given assay and sample context.\u003c\/p\u003e  \u003ch2\u003eBiological background\u003c\/h2\u003e \u003cp\u003eHistamine (2-[4-imidazole]ethylamine) is a low-molecular-weight amine synthesized from L-histidine. It is produced by various cells throughout the body, including central nervous system neurons, gastric mucosa parietal cells, mast cells, basophils and lymphocytes. Histamine is a major biological mediator whose functions include, among many others, regulation of vascular smooth muscle, immune regulation, regulation of sleep-wake cycles and regulation of gastric acid secretion.1The biological effects of histamine are mediated through four receptors (H1- H4 receptors) all of which belong to the 7-transmembrane domain, G protein-coupled receptor (GPCR) superfamily.Histamine H4 receptor couples to Gi\/G0 proteins and receptor activation leads to inhibition of adenylate cyclase, mobilisation of calcium from intracellular stores and activation of the mitogen-activated protein kinase (MAPK) cascade.1,2Histamine H4 receptor is largely expressed in haemopoietic cells including mast cells, eosinophils, dendritic cells and T lymphocytes.\u003c\/p\u003e  \u003ch2\u003eResearch relevance and current trends\u003c\/h2\u003e \u003cul\u003e   \u003cli\u003eComparing target expression across perturbations, genotypes, or treatment conditions.\u003c\/li\u003e   \u003cli\u003eInterpreting localization shifts alongside pathway or phenotypic readouts.\u003c\/li\u003e   \u003cli\u003eUsing orthogonal controls (KO\/KD, peptide competition, isotype concepts) to support conclusions.\u003c\/li\u003e \u003c\/ul\u003e  \u003ch2\u003eCommon research applications\u003c\/h2\u003e \u003cul\u003e   \u003cli\u003eWestern blot (WB): compare target abundance\/size across lysates and conditions; consider isoforms\/PTMs.\u003c\/li\u003e   \u003cli\u003eImmunofluorescence\/ICC: assess subcellular localization and co-localization with markers in cells or sections.\u003c\/li\u003e   \u003cli\u003eFlow cytometry (direct\/indirect): quantify target-positive populations and shifts in expression across subsets.\u003c\/li\u003e   \u003cli\u003eLive cell imaging (LCI): support extracellular-epitope detection on non-permeabilized cells when appropriate.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003eInterpretation typically benefits from comparing matched sample sets (e.g., treated vs control, WT vs KO\/KD) and using orthogonal readouts where feasible.\u003c\/p\u003e  \u003ch2\u003eNotes for experimental interpretation\u003c\/h2\u003e \u003cul\u003e   \u003cli\u003eIsoforms and post-translational modifications can shift apparent molecular weight or epitope accessibility across samples.\u003c\/li\u003e   \u003cli\u003eCross-species signal may depend on epitope conservation; consult the provided homology note when selecting models.\u003c\/li\u003e   \u003cli\u003ePermeabilization, fixation, and antigen retrieval can change accessibility of intracellular vs extracellular epitopes.\u003c\/li\u003e   \u003cli\u003eConceptual control: antigen preadsorption (blocking peptide) can help assess signal dependence on the immunogen region.\u003c\/li\u003e   \u003cli\u003eProvided control suggestions: Negative control: BLP-HR004.\u003c\/li\u003e   \u003cli\u003eApplication notes: see product-specific dilution\/usage notes and control concepts provided in the dataset.\u003c\/li\u003e \u003c\/ul\u003e \u003cp\u003e\u003cstrong\u003eApplication abbreviations:\u003c\/strong\u003e CBE- Cell-based ELISA, FC- Flow cytometry, ICC- Immunocytochemistry, IE- Indirect ELISA, IF- Immunofluorescence, IFC- Indirect flow cytometry, IHC- Immunohistochemistry, IP- Immunoprecipitation, LCI- Live cell imaging, N- Neutralization, WB- Western blot. \u003cstrong\u003eSpecies abbreviations:\u003c\/strong\u003e H- Human, M- Mouse, R- Rat.\u003c\/p\u003e \u003cp\u003e\u003cstrong\u003eRecommended controls:\u003c\/strong\u003e Blocking peptide: BLP-HR004; Negative control: BLP-HR004.\u003c\/p\u003e \u003c!-- Sources (internal): - Alomone Labs product page scientific background (as provided in this catalog row) - UniProt Knowledgebase (target-level reference) - NCBI Gene (target-level reference) - General antibody validation principles (KO\/KD, peptide competition, isotype control concepts) --\u003e","brand":"Alomone Labs","offers":[{"title":"0.2 ml (Carrier Free) \/ 1","offer_id":53064832876909,"sku":"AHR-004-CF-0P2ML-1","price":994.0,"currency_code":"USD","in_stock":true},{"title":"0.2 ml \/ 1","offer_id":53064909816173,"sku":"AHR-004-0P2ML-1","price":795.0,"currency_code":"USD","in_stock":true},{"title":"25 mcl \/ 1","offer_id":53064909848941,"sku":"AHR-004-25MCL-1","price":597.0,"currency_code":"USD","in_stock":true},{"title":"50 mcl \/ 1","offer_id":53064909881709,"sku":"AHR-004-50MCL-1","price":697.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0949\/7424\/7277\/files\/AHR-004_ept.gif?v=1772460995","url":"https:\/\/www.ebiohippo.com\/products\/anti-human-histamine-h4-receptor-hrh4-extracellular-antibody-bha21300537","provider":"BioHippo","version":"1.0","type":"link"}