ERBB4 ELISA Kit (Human)

ELISA Kit

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ERBB4

1308

Tyrosine-protein kinase that plays an essential role as cell surface receptor for neuregulins and EGF family members and regulates development of the heart, the central nervous system and the mammary gland, gene transcription, cell proliferation, differentiation, migration and apoptosis. Required for normal cardiac muscle differentiation during embryonic development, and for postnatal cardiomyocyte proliferation. Required for normal development of the embryonic central nervous system, especially for normal neural crest cell migration and normal axon guidance. Required for mammary gland differentiation, induction of milk proteins and lactation. Acts as cell-surface receptor for the neuregulins NRG1, NRG2, NRG3 and NRG4 and the EGF family members BTC, EREG and HBEGF. Ligand binding triggers receptor dimerization and autophosphorylation at specific tyrosine residues that then serve as binding sites for scaffold proteins and effectors. Ligand specificity and signaling is modulated by alternative splicing, proteolytic processing, and by the formation of heterodimers with other ERBB family members, thereby creating multiple combinations of intracellular phosphotyrosines that trigger ligand- and context-specific cellular responses. Mediates phosphorylation of SHC1 and activation of the MAP kinases MAPK1/ERK2 and MAPK3/ERK1. Isoform JM-A CYT-1 and isoform JM-B CYT-1 phosphorylate PIK3R1, leading to the activation of phosphatidylinositol 3-kinase and AKT1 and protect cells against apoptosis. Isoform JM-A CYT-1 and isoform JM-B CYT-1 mediate reorganization of the actin cytoskeleton and promote cell migration in response to NRG1. Isoform JM-A CYT-2 and isoform JM-B CYT-2 lack the phosphotyrosine that mediates interaction with PIK3R1, and hence do not phosphorylate PIK3R1, do not protect cells against apoptosis, and do not promote reorganization of the actin cytoskeleton and cell migration. Proteolytic processing of isoform JM-A CYT-1 and isoform JM-A CYT-2 gives rise to the corresponding soluble intracellular domains (4ICD) that translocate to the nucleus, promote nuclear import of STAT5A, activation of STAT5A, mammary epithelium differentiation, cell proliferation and activation of gene expression. The ERBB4 soluble intracellular domains (4ICD) colocalize with STAT5A at the CSN2 promoter to regulate transcription of milk proteins during lactation. The ERBB4 soluble intracellular domains can also translocate to mitochondria and promote apoptosis.

NP_001036064

This assay has high sensitivity and excellent specificity for detection of V-Erb A Erythroblastic Leukemia Viral Oncogene Homolog 4 (ErbB4).No significant cross-reactivity or interference between V-Erb A Erythroblastic Leukemia Viral Oncogene Homolog 4 (ErbB4) and analogues was observed.

Component: Amount
Anti-ERBB4 Microplate: 96 Wells (12 x 8 Well Strips)
ERBB4 Lyophilized Standard: 2 x 10 ng
100X Biotinylated ERBB4 Detector Antibody: 120 uL
Avidin/HRP Conjugate: 120 uL
Standard Diluent: 1 x 20 mL
Detector Antibody Diluent: 1 x 12 mL
Conjugate Diluent: 1 x 12 mL
30X Wash Buffer: 1 x 20 mL
TMB Substrate: 1 x 9 mL
Stop Solution: 1 x 6 mL

3h

The test principle applied in this kit is Sandwich enzyme immunoassay. The microtiter plate provided in this kit has been pre-coated with an antibody specific to Erb-b2 Receptor Tyrosine Kinase 4 (ErbB4). Standards or samples are then added to the appropriate microtiter plate wells with a biotin-conjugated antibody specific to Erb-b2 Receptor Tyrosine Kinase 4 (ErbB4). Next, Avidin conjugated to Horseradish Peroxidase (HRP) is added to each microplate well and incubated. After TMB substrate solution is added, only those wells that contain Erb-b2 Receptor Tyrosine Kinase 4 (ErbB4), biotin-conjugated antibody and enzyme-conjugated Avidin will exhibit a change in color. The enzyme-substrate reaction is terminated by the addition of sulphuric acid solution and the color change is measured spectrophotometrically at a wavelength of 450nm +/- 10nm. The concentration of Erb-b2 Receptor Tyrosine Kinase 4 (ErbB4) in the samples is then determined by comparing the O.D. of the samples to the standard curve.

Intra-assay Precision (Precision within an assay): 3 samples with low, middle and high level Erb-b2 Receptor Tyrosine Kinase 4 (ErbB4) were tested 20 times on one plate, respectively. Inter-assay Precision (Precision between assays): 3 samples with low, middle and high level Erb-b2 Receptor Tyrosine Kinase 4 (ErbB4) were tested on 3 different plates, 8 replicates in each plate. CV(%) = SD/meanX100 Intra-Assay: CV<10% Inter-Assay: CV<12%