Human ATF2/Activating Transcription Factor 2 ELISA Kit (HUFI02238)

Product Name:	Human ATF2/Activating Transcription Factor 2 ELISA Kit
Product Code:	HUFI02238
Size:	96 Assays
Alias:	ATF-2
Detection method:	Sandwich ELISA, Double Antibody
Application:	This immunoassay kit allows for the in vitro quantitative determination of Human ATF-2 concentrations in serum plasma and other biological fluids.
Sensitivity:	9.375pg/ml
Range:	15.625-1000pg/ml
Storage:	4°C for 6 months
Note:	For Research Use Only

Recovery:

Matrices listed below were spiked with certain level of Human ATF-2 and the recovery rates were calculated by comparing the measured value to the expected amount of Human ATF-2 in samples.

Matrix	Recovery range(%)	Average(%)
serum(n=5)	85-104	93
EDTA plasma(n=5)	88-99	95
UFH plasma(n=5)	89-105	95

Linearity:

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Human ATF-2 and their serial dilutions. The results were demonstrated by the percentage of calculated concentration to the expected.

Sample	1:2	1:4	1:8
serum(n=5)	85-99%	86-102%	97-105%
EDTA plasma(n=5)	84-100%	83-101%	85-95%
UFH plasma(n=5)	81-100%	85-94%	83-96%

CV(%):

Intra-Assay: CV<8%
Inter-Assay: CV<10%

Component	Quantity	Storage
ELISA Microplate (Dismountable)	8×12 strips	4°C for 6 months
Lyophilized Standard	2	4°C/-20°C
Sample/Standard Dilution Buffer	20ml	4°C
Biotin-labeled Antibody(Concentrated)	120ul	4°C (Protect from light)
Antibody Dilution Buffer	10ml	4°C
HRP-Streptavidin Conjugate(SABC)	120ul	4°C (Protect from light)
SABC Dilution Buffer	10ml	4°C
TMB Substrate	10ml	4°C (Protect from light)
Stop Solution	10ml	4°C
Wash Buffer(25X)	30ml	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

Uniprot

P15336

UniProt Protein Function:	ATF-2: a transcription factor that is a member of the leucine zipper family. Binds to the cAMP-responsive element (CRE). Forms a homodimer or heterodimer with c-Jun and stimulates CRE-dependent transcription. Also possesses histone acetyltransferase (HAT) activity that specifically acetylates histones H2B and H4 in vitro.
UniProt Protein Details:	Protein type:EC 2.3.1.48; Transcription factor; C2H2-type zinc finger protein Chromosomal Location of Human Ortholog: 2q32 Cellular Component: nucleoplasm; mitochondrial outer membrane; cytoplasm; nucleus Molecular Function:RNA polymerase II transcription factor activity, enhancer binding; protein binding; histone acetyltransferase activity; protein heterodimerization activity; metal ion binding; cAMP response element binding protein binding; transcription coactivator activity; chromatin binding; transcription factor activity; protein kinase binding Biological Process: fat cell differentiation; transcription from RNA polymerase II promoter; establishment and/or maintenance of chromatin architecture; MyD88-independent toll-like receptor signaling pathway; stress-activated MAPK cascade; toll-like receptor 3 signaling pathway; positive regulation of transforming growth factor-beta2 production; response to osmotic stress; toll-like receptor 2 signaling pathway; toll-like receptor 10 signaling pathway; MyD88-dependent toll-like receptor signaling pathway; toll-like receptor 5 signaling pathway; regulation of transcription from RNA polymerase II promoter; regulation of transcription, DNA-dependent; regulation of transcription factor activity; intra-S DNA damage checkpoint; toll-like receptor signaling pathway; innate immune response; positive regulation of transcription from RNA polymerase II promoter; positive regulation of transcription factor activity; histone acetylation; toll-like receptor 9 signaling pathway; response to DNA damage stimulus; toll-like receptor 4 signaling pathway
NCBI Summary:	This gene encodes a transcription factor that is a member of the leucine zipper family of DNA binding proteins. The encoded protein has been identified as a moonlighting protein based on its ability to perform mechanistically distinct functions This protein binds to the cAMP-responsive element (CRE), an octameric palindrome. It forms a homodimer or a heterodimer with c-Jun and stimulates CRE-dependent transcription. This protein is also a histone acetyltransferase (HAT) that specifically acetylates histones H2B and H4 in vitro; thus it may represent a class of sequence-specific factors that activate transcription by direct effects on chromatin components. The encoded protein may also be involved in cell's DNA damage response independent of its role in transcriptional regulation. Several alternatively spliced transcript variants have been found for this gene [provided by RefSeq, Jan 2014]
UniProt Code:	P15336
NCBI GenInfo Identifier:	215274241
NCBI Gene ID:	1386
NCBI Accession:	P15336.4
UniProt Secondary Accession:	P15336,Q13000, Q3B7B7, Q4ZFU9, Q53RY2, Q8TAR1, A1L3Z2 A4D7U4, A4D7U5, A4D7V1, D3DPE9, G8JLM5,
UniProt Related Accession:	P15336
Molecular Weight:	505
NCBI Full Name:	Cyclic AMP-dependent transcription factor ATF-2
NCBI Synonym Full Names:	activating transcription factor 2
NCBI Official Symbol:	ATF2
NCBI Official Synonym Symbols:	HB16; CREB2; TREB7; CREB-2; CRE-BP1
NCBI Protein Information:	cyclic AMP-dependent transcription factor ATF-2; histone acetyltransferase ATF2; cAMP-dependent transcription factor ATF-2; cAMP-responsive element-binding protein 2; cAMP response element-binding protein CRE-BP1; cyclic AMP-responsive element-binding protein 2; cAMP responsive element binding protein 2, formerly; activating transcription factor 2 splice variant ATF2-var2
UniProt Protein Name:	Cyclic AMP-dependent transcription factor ATF-2
UniProt Synonym Protein Names:	Activating transcription factor 2; Cyclic AMP-responsive element-binding protein 2; CREB-2; cAMP-responsive element-binding protein 2; HB16; Histone acetyltransferase ATF2; cAMP response element-binding protein CRE-BP1
Protein Family:	Alcohol O-acetyltransferase
UniProt Gene Name:	ATF2
UniProt Entry Name:	ATF2_HUMAN

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

Before adding to wells, equilibrate the SABC working solution and TMB substrate for at least 30 min at 37°C. When diluting samples and reagents, they must be mixed completely and evenly. It is recommended to plot a standard curve for each test.

Step	Protocol
1.	Set standard, test sample and control (zero) wells on the pre-coated plate respectively, and then, record their positions. It is recommended to measure each standard and sample in duplicate. Wash plate 2 times before adding standard, sample and control (zero) wells!
2.	Aliquot 0.1ml standard solutions into the standard wells.
3.	Add 0.1 ml of Sample / Standard dilution buffer into the control (zero) well.
4.	Add 0.1 ml of properly diluted sample ( Human serum, plasma, tissue homogenates and other biological fluids.) into test sample wells.
5.	Seal the plate with a cover and incubate at 37 °C for 90 min.
6.	Remove the cover and discard the plate content, clap the plate on the absorbent filter papers or other absorbent material. Do NOT let the wells completely dry at any time. Wash plate X2.
7.	Add 0.1 ml of Biotin- detection antibody working solution into the above wells (standard, test sample & zero wells). Add the solution at the bottom of each well without touching the side wall.
8.	Seal the plate with a cover and incubate at 37°C for 60 min.
9.	Remove the cover, and wash plate 3 times with Wash buffer. Let wash buffer rest in wells for 1 min between each wash.
10.	Add 0.1 ml of SABC working solution into each well, cover the plate and incubate at 37°C for 30 min.
11.	Remove the cover and wash plate 5 times with Wash buffer, and each time let the wash buffer stay in the wells for 1-2 min.
12.	Add 90 Âµl of TMB substrate into each well, cover the plate and incubate at 37°C in dark within 10-20 min. (Note: This incubation time is for reference use only, the optimal time should be determined by end user.) And the shades of blue can be seen in the first 3-4 wells (with most concentrated standard solutions), the other wells show no obvious color.
13.	Add 50 Âµl of Stop solution into each well and mix thoroughly. The color changes into yellow immediately.
14.	Read the O.D. absorbance at 450 nm in a microplate reader immediately after adding the stop solution.

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.