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ChemiScreen™ Membrane Preparation Human Recombinant BB2

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货号：HTS084M

品牌：Millipore 密理博

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Replacement Information

重要规格表

Species Host Cells Protein Target
Human Chem-1 BB2
Description
Catalogue Number HTS084M
Brand Family Chemicon®
Trade Name
  • ChemiScreen
  • Chemicon
Description ChemiScreen™ BB2 Bombesin Receptor Membrane Preparation
Overview Full-length human GRPR cDNA encoding BB2
Background Information Bombesin, a bioactive peptide first identified in amphibian skin, is related to two mammalian peptides, gastrin-releasing peptide (GRP) and neuromedin B. A family of 3 GPCRs, including NMB-R (BB1), GRP-R (BB2) and BRS-3 (BB3), mediate the biological effects of the peptides. The receptors differ in their affinities for the peptides. Binding of ligand to BB2 activates Gq to increase intracellular calcium concentrations. GRP stimulates release of gastrin from endocrine cells and stimulates smooth muscle activity in the gastrointestinal tract. In addition, binding of GRP to BB2 stimulates proliferation of a variety of cell types, and has been implicated in the progression of small cell lung cancer and other malignancies. The CNS is also a major site of GRP expression, and GRP and BB2 are involved in the circadian clock, conditioned fear, and food intake (Ohki-Hamazaki et al., 2005). Chemicon's BB2 membrane preparations are crude membrane preparations made from our proprietary stable recombinant cell lines to ensure high-level of GPCR surface expression; thus, they are ideal HTS tools for screening of antagonists of BB2 interactions and its ligands. The membrane preparations exhibit a Kd of 0.114 nM for [125I]-Tyr4-Bombesin. With 0.3nM [125I]-Tyr4-Bombesin, 5 µg/well or 10 µg/well BB2 Membrane Prep typically yield greater than 20-fold signal-to-background ratio.
References
Product Information
Format Membranes
Presentation Liquid in packaging buffer: 50 mM Tris pH 7.4, 10% glycerol and 1% BSA no preservatives.
Packaging method: Membranes protein were adjusted to 0.5 mg/ml in 1 ml packaging buffer, rapidly frozen, and stored at -80°C.
Applications
Application Human BB2 GPCR membrane preparation for Radioligand binding Assays & GTPγS binding.
Key Applications
  • Radioligand binding assay
  • GTPγS binding
Application Notes Radioligand binding assay and GTPγS binding.
Biological Information
Entrez Gene Number
Gene Symbol
  • BRS3
GPCR Class A
Host Cells Chem-1
Protein Target BB2
Target Sub-Family Bombesin
UniProt Number
Incubation Conditions Membranes are mixed with radioactive ligand and unlabeled competitor (see Figures 1 and 2 for concentrations tested) in binding buffer in a nonbinding 96-well plate, and incubated for 1-2 h. Prior to filtration, a GF/C 96-well filter plate is coated with 0.33% polyethyleneimine for 30 min, then washed with 50mM HEPES, pH 7.4, 0.5% BSA. Binding reaction is transferred to the filter plate, and washed 3 times (1 mL per well per wash) with Wash Buffer. The plate is dried and counted.
Binding buffer: 50 mM Tris, pH 7.4, 10 mM MgCl2, 1 mM EDTA, filtered and stored at 4°C
Radioligand: [125I]-Tyr4-Bombesin (Perkin Elmer#:NEX-258 )
Wash Buffer: 50 mM Tris, pH 7.4 filtered and stored at 4°C.
One package contains enough membranes for at least 200 assays (units), where a unit is the amount of membrane that will yield greater than 10-fold signal:background with 125I labeled Bombesin at 0.3 nM
Physicochemical Information
Dimensions
Materials Information
Toxicological Information
Safety Information according to GHS
Safety Information

Signal:background and specific binding values obtained in a competition binding assay with varying amounts of BB2 membrane prep:
Product Usage Statements
10 µg/well 5 µg/well
Signal:Background 24 23
Specific Binding (cpm) 19,260 12,610


SPECIFICATION: Bmax: 1.28 pmol/mg; Kd: 0.114 nM
Usage Statement
  • Unless otherwise stated in our catalog or other company documentation accompanying the product(s), our products are intended for research use only and are not to be used for any other purpose, which includes but is not limited to, unauthorized commercial uses, in vitro diagnostic uses, ex vivo or in vivo therapeutic uses or any type of consumption or application to humans or animals.
Storage and Shipping Information
Storage Conditions Maintain frozen at -70°C for up to 2 years. Do not freeze and thaw.
Packaging Information
Material Size 200 assays
Transport Information
Supplemental Information
Specifications

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