Rat CLDN3/Claudin-3 ELISA Kit (RTFI00319)

Product Name:	Rat CLDN3/Claudin-3 ELISA Kit
Product Code:	RTFI00319
Size:	96 Assays
Target:	Rat Cldn3
Alias:	Cldn3, CPE-R 2, CPETR2, HRVP1, C7orf1, Clostridium perfringens enterotoxin receptor 2, CPE-R 2, CPE-R2, CPETR2CPE-receptor 2, HRVP1, hRVP1, Rat ventral prostate.1 protein homolog, RVP1, ventral prostate.1 protein homolog, ventral prostate.1-like protein
Reactivity:	Rat
Detection Method:	Sandwich ELISA, Double Antibody
Sensitivity:	0.094ng/ml
Range:	0.156-10ng/ml
Storage:	4°C for 6 months
Note:	For Research Use Only

Recovery:

Matrices listed below were spiked with certain level of Rat Cldn3 and the recovery rates were calculated by comparing the measured value to the expected amount of Rat Cldn3 in samples.

Matrix	Recovery range(%)	Average(%)
serum(n=5)	86-103	96
EDTA plasma(n=5)	89-104	96
UFH plasma(n=5)	87-103	96

Linearity:

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Rat Cldn3 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)	87-98%	92-104%	91-102%
EDTA plasma(n=5)	85-97%	82-101%	82-98%
UFH plasma(n=5)	83-100%	80-93%	89-99%

Intra-Assay:

CV <8%

Inter-Assay:

CV <10%

Uniprot:

Q63400

UniProt Protein Function:	Claudin-3: Plays a major role in tight junction-specific obliteration of the intercellular space, through calcium- independent cell-adhesion activity. CLDN3 is located in the Williams-Beuren syndrome (WBS) critical region. WBS results from a hemizygous deletion of several genes on chromosome 7q11.23, thought to arise as a consequence of unequal crossing over between highly homologous low-copy repeat sequences flanking the deleted region. Belongs to the claudin family.
UniProt Protein Details:	Protein type:Membrane protein, multi-pass; Membrane protein, integral; Cytoskeletal Chromosomal Location of Human Ortholog: 7q11.23 Cellular Component: apicolateral plasma membrane; integral to membrane; integral to plasma membrane; lateral plasma membrane; tight junction Molecular Function:identical protein binding; structural molecule activity; transmembrane receptor activity Biological Process: calcium-independent cell-cell adhesion; protein heterooligomerization; protein homooligomerization; response to hypoxia; signal transduction
NCBI Summary:	Tight junctions represent one mode of cell-to-cell adhesion in epithelial or endothelial cell sheets, forming continuous seals around cells and serving as a physical barrier to prevent solutes and water from passing freely through the paracellular space. These junctions are comprised of sets of continuous networking strands in the outwardly facing cytoplasmic leaflet, with complementary grooves in the inwardly facing extracytoplasmic leaflet. The protein encoded by this intronless gene, a member of the claudin family, is an integral membrane protein and a component of tight junction strands. It is also a low-affinity receptor for Clostridium perfringens enterotoxin, and shares aa sequence similarity with a putative apoptosis-related protein found in rat. [provided by RefSeq, Jul 2008]
UniProt Code:	Q63400
NCBI GenInfo Identifier:	6685273
NCBI Gene ID:	1365
NCBI Accession:	O15551.1
UniProt Secondary Accession:	Q63400,Q9Z0G9, Q63400,
UniProt Related Accession:	O15551
Molecular Weight:	23,319 Da
NCBI Full Name:	Claudin-3
NCBI Synonym Full Names:	claudin 3
NCBI Official Symbol:	CLDN3
NCBI Official Synonym Symbols:	RVP1; HRVP1; C7orf1; CPE-R2; CPETR2
NCBI Protein Information:	claudin-3
UniProt Protein Name:	Claudin-3
UniProt Synonym Protein Names:	Clostridium perfringens enterotoxin receptor 2; CPE-R 2; CPE-receptor 2; Rat ventral prostate.1 protein homolog; hRVP1
Protein Family:	Claudin
UniProt Gene Name:	CLDN3
UniProt Entry Name:	CLD3_HUMAN

Step	Procedure
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 µL 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 µL 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 clotovernight at 2-8°C. Centrifuge for 10 minutes at 1,000x g. Removeserum 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 anti-coagulant. 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 & homogenizein 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.