Product Name:	Human Tyrosine-protein kinase JAK2 (JAK2) ELISA Kit
SKU:	HUEB2616
Size:	96T
Target:	Human Tyrosine-protein kinase JAK2 (JAK2)
Synonyms:	Janus kinase 2, JAK-2
Assay Type:	Sandwich
Detection Method:	ELISA
Reactivity:	Human
Detection Range:	0.156-10ng/mL
Sensitivity:	0.076ng/mL

Intra CV:

4.1%

Inter CV:

8.6%

Linearity:

Sample	1:2	1:4	1:8	1:16
Serum(N=5)	107-117%	82-92%	106-116%	101-111%
EDTA Plasma(N=5)	82-92%	87-96%	91-101%	103-113%
Heparin Plasma(N=5)	83-92%	91-103%	102-112%	102-111%

Recovery:

Sample Type	Average(%)	Recovery Range(%)
Serum	112	106-118
Plasma	114	108-120

Function:

Non-receptor tyrosine kinase involved in various processes such as cell growth, development, differentiation or histone modifications. Mediates essential signaling events in both innate and adaptive immunity. In the cytoplasm, plays a pivotal role in signal transduction via its association with type I receptors such as growth hormone (GHR), prolactin (PRLR), leptin (LEPR), erythropoietin (EPOR), thrombopoietin (THPO); or type II receptors including IFN-alpha, IFN-beta, IFN-gamma and multiple interleukins (PubMed:7615558). Following ligand-binding to cell surface receptors, phosphorylates specific tyrosine residues on the cytoplasmic tails of the receptor, creating docking sites for STATs proteins (PubMed:9618263). Subsequently, phosphorylates the STATs proteins once they are recruited to the receptor. Phosphorylated STATs then form homodimer or heterodimers and translocate to the nucleus to activate gene transcription. For example, cell stimulation with erythropoietin (EPO) during erythropoiesis leads to JAK2 autophosphorylation, activation, and its association with erythropoietin receptor (EPOR) that becomes phosphorylated in its cytoplasmic domain. Then, STAT5 (STAT5A or STAT5B) is recruited, phosphorylated and activated by JAK2. Once activated, dimerized STAT5 translocates into the nucleus and promotes the transcription of several essential genes involved in the modulation of erythropoiesis. In addition, JAK2 mediates angiotensin-2-induced ARHGEF1 phosphorylation (PubMed:20098430). Plays a role in cell cycle by phosphorylating CDKN1B (PubMed:21423214). Cooperates with TEC through reciprocal phosphorylation to mediate cytokine-driven activation of FOS transcription. In the nucleus, plays a key role in chromatin by specifically mediating phosphorylation of 'Tyr-41' of histone H3 (H3Y41ph), a specific tag that promotes exclusion of CBX5 (HP1 alpha) from chromatin (PubMed:19783980).

Uniprot:	O60674
Sample Type:	Serum, plasma, tissue homogenates, cell culture supernates and other biological fluids
Specificity:	Natural and recombinant human Tyrosine-protein kinase JAK2
Sub Unit:	Interacts with EPOR, LYN, SIRPA, SH2B1 and TEC (By similarity). Interacts with IL23R (PubMed:12023369). Interacts with SKB1 (PubMed:10531356). Interacts with STAM2 (PubMed:10899310). Interacts with IFNGR2 (via intracellular domain) (PubMed:7673114, PubMed:7615558). Interacts with LEPR (Isoform B) (By similarity). Interacts with HSP90AB1; promotes functional activation in a heat shock-dependent manner (PubMed:20353823).
Research Area:	Cancer
Subcellular Location:	Endomembrane system Peripheral membrane protein Cytoplasm Nucleus
Storage:	Please see kit components below for exact storage details
Note:	For research use only

UniProt Protein Function:	JAK2: a non-receptor tyrosine-kinase involved in a specific subset of cytokine receptor signaling pathways, including IL-3, -5 and GM-CSF. Interacts with IL23R, SKB1 and STAM2. It has been found to be constitutively associated with the prolactin receptor and is required for responses to gamma interferon. Mice that do not express an active protein for this gene exhibit embryonic lethality associated with the absence of definitive erythropoiesis. Fusion of Jak2 to TEL1 (ETV6) by t(9;12)(p24;p13) causes myeloproliferative disease in humans and mouse models. The Jak inhibitor AG490 inhibits constitutive Jak2 phosphorylation and causes apoptosis in cells from breast cancer and relapsing acute lymphoblastic leukemia. A single activating mutation is associated with several hematological malignancies. Inhibitor: AG490.
UniProt Protein Details:	Protein type:Protein kinase, TK; EC 2.7.10.2; Kinase, protein; Oncoprotein; Protein kinase, tyrosine (non-receptor); TK group; JakA family Chromosomal Location of Human Ortholog: 9p24 Cellular Component: caveola; cytoplasm; cytoskeleton; cytosol; extrinsic to internal side of plasma membrane; lipid raft; nuclear matrix; nucleoplasm; nucleus Molecular Function:acetylcholine receptor binding; ATP binding; growth hormone receptor binding; heme binding; histone binding; insulin receptor substrate binding; interleukin-12 receptor binding; metal ion binding; non-membrane spanning protein tyrosine kinase activity; peptide hormone receptor binding; phosphoinositide 3-kinase binding; protein binding; protein C-terminus binding; protein kinase activity; protein kinase binding; protein-tyrosine kinase activity; Ras guanyl-nucleotide exchange factor activity; receptor binding; SH2 domain binding; type 1 angiotensin receptor binding Biological Process: actin filament polymerization; activation of MAPKK activity; adaptive immune response; apoptosis; axon regeneration; blood coagulation; caspase activation; cell differentiation; cell migration; cell motility; cytokine and chemokine mediated signaling pathway; elevation of cytosolic calcium ion concentration; enzyme linked receptor protein signaling pathway; erythrocyte differentiation; G-protein coupled receptor protein signaling pathway; induction of apoptosis by oxidative stress; innate immune response; JAK-STAT cascade; MAPKKK cascade; mesoderm development; mineralocorticoid receptor signaling pathway; negative regulation of cell proliferation; negative regulation of cell-cell adhesion; negative regulation of DNA binding; negative regulation of heart contraction; negative regulation of neuron apoptosis; peptidyl-tyrosine phosphorylation; platelet-derived growth factor receptor signaling pathway; positive regulation of cell activation; positive regulation of cell differentiation; positive regulation of cell migration; positive regulation of cell proliferation; positive regulation of DNA binding; positive regulation of GTPase activity; positive regulation of inflammatory response; positive regulation of insulin secretion; positive regulation of interleukin-1 beta production; positive regulation of nitric oxide biosynthetic process; positive regulation of nitric-oxide synthase biosynthetic process; positive regulation of peptidyl-tyrosine phosphorylation; positive regulation of phosphoinositide 3-kinase cascade; positive regulation of phosphoprotein phosphatase activity; positive regulation of protein import into nucleus, translocation; positive regulation of transcription factor activity; positive regulation of tumor necrosis factor production; positive regulation of tyrosine phosphorylation of Stat3 protein; positive regulation of tyrosine phosphorylation of Stat5 protein; protein amino acid autophosphorylation; protein amino acid phosphorylation; regulation of apoptosis; regulation of cell proliferation; regulation of inflammatory response; response to antibiotic; response to hydroperoxide; response to lipopolysaccharide; signal transduction; STAT protein nuclear translocation; tumor necrosis factor-mediated signaling pathway; tyrosine phosphorylation of JAK2 protein; tyrosine phosphorylation of STAT protein; tyrosine phosphorylation of Stat1 protein; tyrosine phosphorylation of Stat3 protein; tyrosine phosphorylation of Stat5 protein Disease: Budd-chiari Syndrome; Erythrocytosis, Familial, 1; Myelofibrosis; Polycythemia Vera; Thrombocythemia 3
NCBI Summary:	This gene product is a protein tyrosine kinase involved in a specific subset of cytokine receptor signaling pathways. It has been found to be constituitively associated with the prolactin receptor and is required for responses to gamma interferon. Mice that do not express an active protein for this gene exhibit embryonic lethality associated with the absence of definitive erythropoiesis. [provided by RefSeq, Jul 2008]
UniProt Code:	O60674
NCBI GenInfo Identifier:	12643404
NCBI Gene ID:	3717
NCBI Accession:	O60674.2
UniProt Secondary Accession:	O60674,O14636, O75297,
UniProt Related Accession:	O60674
Molecular Weight:	130,674 Da
NCBI Full Name:	Tyrosine-protein kinase JAK2
NCBI Synonym Full Names:	Janus kinase 2
NCBI Official Symbol:	JAK2
NCBI Official Synonym Symbols:	JTK10; THCYT3
NCBI Protein Information:	tyrosine-protein kinase JAK2
UniProt Protein Name:	Tyrosine-protein kinase JAK2
UniProt Synonym Protein Names:	Janus kinase 2; JAK-2
Protein Family:	Tyrosine-protein kinase
UniProt Gene Name:	JAK2
UniProt Entry Name:	JAK2_HUMAN

Component	Quantity (96 Assays)	Storage
ELISA Microplate (Dismountable)	8×12 strips	-20°C
Lyophilized Standard	2	-20°C
Sample Diluent	20ml	-20°C
Assay Diluent A	10mL	-20°C
Assay Diluent B	10mL	-20°C
Detection Reagent A	120µL	-20°C
Detection Reagent B	120µL	-20°C
Wash Buffer	30mL	4°C
Substrate	10mL	4°C
Stop Solution	10mL	4°C
Plate Sealer	5	-

Other materials and equipment required:

Microplate reader with 450 nm wavelength filter
Multichannel Pipette, Pipette, microcentrifuge tubes and disposable pipette tips
Incubator
Deionized or distilled water
Absorbent paper
Buffer resevoir

*Note: The below protocol is a sample protocol. Protocols are specific to each batch/lot. For the correct instructions please follow the protocol included in your kit.

Allow all reagents to reach room temperature (Please do not dissolve the reagents at 37°C directly). All the reagents should be mixed thoroughly by gently swirling before pipetting. Avoid foaming. Keep appropriate numbers of strips for 1 experiment and remove extra strips from microtiter plate. Removed strips should be resealed and stored at -20°C until the kits expiry date. Prepare all reagents, working standards and samples as directed in the previous sections. Please predict the concentration before assaying. If values for these are not within the range of the standard curve, users must determine the optimal sample dilutions for their experiments. We recommend running all samples in duplicate.

Step
1.	Add Sample: Add 100µL of Standard, Blank, or Sample per well. The blank well is added with Sample diluent. Solutions are added to the bottom of micro ELISA plate well, avoid inside wall touching and foaming as possible. Mix it gently. Cover the plate with sealer we provided. Incubate for 120 minutes at 37°C.
2.	Remove the liquid from each well, don't wash. Add 100µL of Detection Reagent A working solution to each well. Cover with the Plate sealer. Gently tap the plate to ensure thorough mixing. Incubate for 1 hour at 37°C. Note: if Detection Reagent A appears cloudy warm to room temperature until solution is uniform.
3.	Aspirate each well and wash, repeating the process three times. Wash by filling each well with Wash Buffer (approximately 400µL) (a squirt bottle, multi-channel pipette,manifold dispenser or automated washer are needed). Complete removal of liquid at each step is essential. After the last wash, completely remove remaining Wash Buffer by aspirating or decanting. Invert the plate and pat it against thick clean absorbent paper.
4.	Add 100µL of Detection Reagent B working solution to each well. Cover with the Plate sealer. Incubate for 60 minutes at 37°C.
5.	Repeat the wash process for five times as conducted in step 3.
6.	Add 90µL of Substrate Solution to each well. Cover with a new Plate sealer and incubate for 10-20 minutes at 37°C. Protect the plate from light. The reaction time can be shortened or extended according to the actual color change, but this should not exceed more than 30 minutes. When apparent gradient appears in standard wells, user should terminatethe reaction.
7.	Add 50µL of Stop Solution to each well. If color change does not appear uniform, gently tap the plate to ensure thorough mixing.
8.	Determine the optical density (OD value) of each well at once, using a micro-plate reader set to 450 nm. User should open the micro-plate reader in advance, preheat the instrument, and set the testing parameters.
9.	After experiment, store all reagents according to the specified storage temperature respectively until their expiry.

When carrying out an ELISA assay it is important to prepare your samples in order to achieve the best possible results. Below we have a list of procedures for the preparation of samples for different sample types.

Sample Type	Protocol
Serum	If using serum separator tubes, allow samples to clot for 30 minutes at room temperature. Centrifuge for 10 minutes at 1,000x g. Collect the serum fraction and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles. If serum separator tubes are not being used, allow samples to clot overnight at 2-8°C. Centrifuge for 10 minutes at 1,000x g. Remove serum and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles.
Plasma	Collect plasma using EDTA or heparin as an anticoagulant. Centrifuge samples at 4°C for 15 mins at 1000 × g within 30 mins of collection. Collect the plasma fraction and assay promptly or aliquot and store the samples at -80°C. Avoid multiple freeze-thaw cycles. Note: Over haemolysed samples are not suitable for use with this kit.
Urine & Cerebrospinal Fluid	Collect the urine (mid-stream) in a sterile container, centrifuge for 20 mins at 2000-3000 rpm. Remove supernatant and assay immediately. If any precipitation is detected, repeat the centrifugation step. A similar protocol can be used for cerebrospinal fluid.
Cell culture supernatant	Collect the cell culture media by pipette, followed by centrifugation at 4°C for 20 mins at 1500 rpm. Collect the clear supernatant and assay immediately.
Cell lysates	Solubilize cells in lysis buffer and allow to sit on ice for 30 minutes. Centrifuge tubes at 14,000 x g for 5 minutes to remove insoluble material. Aliquot the supernatant into a new tube and discard the remaining whole cell extract. Quantify total protein concentration using a total protein assay. Assay immediately or aliquot and store at ≤ -20 °C.
Tissue homogenates	The preparation of tissue homogenates will vary depending upon tissue type. Rinse tissue with 1X PBS to remove excess blood & homogenize in 20ml of 1X PBS (including protease inhibitors) and store overnight at ≤ -20°C. Two freeze-thaw cycles are required to break the cell membranes. To further disrupt the cell membranes you can sonicate the samples. Centrifuge homogenates for 5 mins at 5000xg. Remove the supernatant and assay immediately or aliquot and store at -20°C or -80°C.
Tissue lysates	Rinse tissue with PBS, cut into 1-2 mm pieces, and homogenize with a tissue homogenizer in PBS. Add an equal volume of RIPA buffer containing protease inhibitors and lyse tissues at room temperature for 30 minutes with gentle agitation. Centrifuge to remove debris. Quantify total protein concentration using a total protein assay. Assay immediately or aliquot and store at ≤ -20 °C.
Breast Milk	Collect milk samples and centrifuge at 10,000 x g for 60 min at 4°C. Aliquot the supernatant and assay. For long term use, store samples at -80°C. Minimize freeze/thaw cycles.

ELISA	Antibodies
Human JAK2 ELISA Kit	Anti-JAK2 Antibody (CAB11497)
JAK2 Colorimetric Cell-Based ELISA Kit	Anti-JAK2 Antibody (CAB19629)
JAK2 (Phospho-Tyr221) Colorimetric Cell-Based ELISA Kit	Anti-JAK2 Antibody (CAB7694)
JAK2 (Phospho-Tyr570) Colorimetric Cell-Based ELISA Kit	Anti-Phospho-JAK2-Y1007 Antibody (CABP0373)
	Anti-Phospho-JAK2-Y221 Antibody (CABP0374)