Human Serum response factor/SRF ELISA Kit (HUFI01994)

Product Name:	Human Serum response factor/SRF ELISA Kit
Product Code:	HUFI01994
Size:	96 Assays
Alias:	SRF
Detection method:	Sandwich ELISA, Double Antibody
Application:	This immunoassay kit allows for the in vitro quantitative determination of Human SRF concentrations in serum plasma and other biological fluids.
Sensitivity:	18.75pg/ml
Range:	31.25-2000pg/ml
Storage:	4°C for 6 months
Note:	For Research Use Only

Recovery:

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

Matrix	Recovery range(%)	Average(%)
serum(n=5)	88-99	93
EDTA plasma(n=5)	97-104	99
UFH plasma(n=5)	88-105	98

Linearity:

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Human SRF 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)	88-104%	88-105%	87-98%
EDTA plasma(n=5)	84-90%	83-100%	84-101%
UFH plasma(n=5)	81-99%	82-96%	82-99%

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

P11831

UniProt Protein Function:	SRF: a transcription factor of the MADS domain family that binds to the serum response element (SRE). Regulates the transcription of immediate early genes including c-fos. Binds DNA as a multimer, probably a dimer.
UniProt Protein Details:	Protein type:Transcription factor; Motility/polarity/chemotaxis Chromosomal Location of Human Ortholog: 6p21.1 Cellular Component: cytoplasm; nuclear chromatin; nucleoplasm; nucleus Molecular Function:chromatin DNA binding; histone deacetylase binding; protein binding; protein homodimerization activity; RNA polymerase II transcription factor activity, enhancer binding; transcription factor activity; transcription factor binding Biological Process: angiogenesis involved in wound healing; associative learning; cardiac myofibril assembly; cell migration during sprouting angiogenesis; cell-matrix adhesion; developmental growth; erythrocyte development; heart development; heart looping; hippocampus development; long-term memory; mesoderm formation; morphogenesis of an epithelial sheet; mRNA transcription from RNA polymerase II promoter; muscle maintenance; negative regulation of cell migration; negative regulation of cell proliferation; neurite development; neuron development; neuron migration; patterning of blood vessels; platelet activation; platelet formation; positive regulation of axon extension; positive regulation of cell differentiation; positive regulation of filopodium formation; positive regulation of smooth muscle contraction; positive regulation of transcription by glucose; positive regulation of transcription factor activity; positive regulation of transcription from RNA polymerase II promoter; positive thymic T cell selection; regulation of cell adhesion; regulation of smooth muscle cell differentiation; regulation of water loss via skin; response to cytokine stimulus; response to hormone stimulus; response to hypoxia; response to toxin; sarcomere organization; skin morphogenesis; small GTPase mediated signal transduction; stress fiber formation; tangential migration from the subventricular zone to the olfactory bulb; thymus development; thyroid gland development; transcription from RNA polymerase II promoter; trophectodermal cell differentiation
NCBI Summary:	This gene encodes a ubiquitous nuclear protein that stimulates both cell proliferation and differentiation. It is a member of the MADS (MCM1, Agamous, Deficiens, and SRF) box superfamily of transcription factors. This protein binds to the serum response element (SRE) in the promoter region of target genes. This protein regulates the activity of many immediate-early genes, for example c-fos, and thereby participates in cell cycle regulation, apoptosis, cell growth, and cell differentiation. This gene is the downstream target of many pathways; for example, the mitogen-activated protein kinase pathway (MAPK) that acts through the ternary complex factors (TCFs). Two transcript variants encoding different isoforms have been found for this gene. [provided by RefSeq, May 2014]
UniProt Code:	P11831
NCBI GenInfo Identifier:	134876
NCBI Gene ID:	6722
NCBI Accession:	P11831.1
UniProt Secondary Accession:	P11831,Q5T648,
UniProt Related Accession:	P11831
Molecular Weight:	51,593 Da
NCBI Full Name:	Serum response factor
NCBI Synonym Full Names:	serum response factor
NCBI Official Symbol:	SRFÂ Â
NCBI Official Synonym Symbols:	MCM1Â Â
NCBI Protein Information:	serum response factor
UniProt Protein Name:	Serum response factor
Protein Family:	Serum response factor
UniProt Gene Name:	SRFÂ Â
UniProt Entry Name:	SRF_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.

Human Serum response factor/SRF ELISA Kit (HUFI01994)

Description