Human ARID4B ELISA Kit

Product Name:	Human ARID4B ELISA Kit
Product Code:	HUFI01346
Size:	96 Assays
Alias:	ARID4B, AT-rich interactive domain-containing protein 4B, ARID domain-containing protein 4B, Retinoblastoma-binding protein 1-like 1, Histone deacetylase complex subunit SAP180, 180 kDa Sin3-associated polypeptide, Sin3-associated polypeptide p180, Breast cancer-associated antigen BRCAA1, BRCAA1, RBBP1L1, RBP1L1, SAP180
Detection method:	Sandwich ELISA, Double Antibody
Application:	This immunoassay kit allows for the in vitro quantitative determination of Human ARID4B concentrations in serum plasma and other biological fluids.
Sensitivity:	0.188ng/ml
Range:	0.313-20ng/ml
Storage:	4°C for 6 months
Note:	For Research Use Only

Recovery:

Matrices listed below were spiked with certain level of Human ARID4B and the recovery rates were calculated by comparing the measured value to the expected amount of Human ARID4B in samples.

Matrix	Recovery range(%)	Average(%)
serum(n=5)	85-103	91
EDTA plasma(n=5)	89-104	97
UFH plasma(n=5)	85-102	93

Linearity:

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Human ARID4B 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)	90-105%	94-105%	87-102%
EDTA plasma(n=5)	83-101%	84-93%	85-97%
UFH plasma(n=5)	80-96%	80-99%	85-96%

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

Q4LE39

UniProt Protein Function:	ARID4B: Acts as a transcriptional repressor. May function in the assembly and/or enzymatic activity of the Sin3A corepressor complex or in mediating interactions between the complex and other regulatory complexes. 4 isoforms of the human protein are produced by alternative splicing.
UniProt Protein Details:	Protein type:DNA-binding Chromosomal Location of Human Ortholog: 1q42.3 Cellular Component: nucleoplasm; cytoplasm; nucleus Molecular Function:protein binding Biological Process: regulation of transcription from RNA polymerase II promoter; establishment and/or maintenance of chromatin architecture; genetic imprinting; transcription, DNA-dependent; negative regulation of gene expression, epigenetic; positive regulation of transcription from RNA polymerase II promoter; gene expression; spermatogenesis; regulation of gene expression, epigenetic
NCBI Summary:	This gene encodes a protein with sequence similarity to retinoblastoma-binding protein-1. The encoded protein is a subunit of the histone deacetylase-dependant SIN3A transcriptional corepressor complex, which functions in diverse cellular processes including proliferation, differentiation, apoptosis, oncogenesis, and cell fate determination. The gene product is recognized by IgG antibody isolated from a breast cancer patient and appears to be a molecular marker associated with a broad range of human malignancies. Alternate transcriptional splice variants encoding different isoforms have been characterized. [provided by RefSeq, Jul 2008]
UniProt Code:	Q4LE39
NCBI GenInfo Identifier:	143955276
NCBI Gene ID:	51742
NCBI Accession:	Q4LE39.2
UniProt Secondary Accession:	Q4LE39,Q3MHV4, Q5HY99, Q5T2C2, Q5T2C3, Q5T2C4, Q5T2C5 Q5T2C6, Q6P600, Q86UX1, Q86WR4, A1L465,
UniProt Related Accession:	Q4LE39
Molecular Weight:	91,140 Da
NCBI Full Name:	AT-rich interactive domain-containing protein 4B
NCBI Synonym Full Names:	AT rich interactive domain 4B (RBP1-like)
NCBI Official Symbol:	ARID4B
NCBI Official Synonym Symbols:	BCAA; BRCAA1; RBP1L1; SAP180; RBBP1L1
NCBI Protein Information:	AT-rich interactive domain-containing protein 4B; Rb-binding protein homolog; SIN3A-associated protein 180; sin3-associated polypeptide p180; ARID domain-containing protein 4B; breast cancer-associated antigen 1; 180 kDa Sin3-associated polypeptide; breast carcinoma-associated antigen; breast cancer-associated antigen BRCAA1; retinoblastoma-binding protein 1-like 1; histone deacetylase complex subunit SAP180
UniProt Protein Name:	AT-rich interactive domain-containing protein 4B
UniProt Synonym Protein Names:	180 kDa Sin3-associated polypeptide; Sin3-associated polypeptide p180; Breast cancer-associated antigen BRCAA1; Histone deacetylase complex subunit SAP180; Retinoblastoma-binding protein 1-like 1
Protein Family:	AT-rich interactive domain-containing protein
UniProt Gene Name:	ARID4B
UniProt Entry Name:	ARI4B_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.