Rat Reg3a ELISA Kit (RTFI00310)- High Sensitivity

Product Name:	Rat Reg3a (RegeneRating islet-derived protein 3-alpha) ELISA Kit
Product Code:	RTFI00310
Size:	96 Assays
Target:	Rat Reg3a
Alias:	Reg3a, Lithostathine 3, PAP2, REG3A, hepatocarcinoma-intestine-pancreas, HIPpancreatitis-associated protein, Human proislet peptide, pancreatic beta cell growth factor, Pancreatitis-associated protein 1, PAP homologous protein, PAP1FLJ18565, PAPPAP-H, PBCGF, prolifeRation-inducing protein 34, prolifeRation-inducing protein 42, Reg III-alpha, REG3, REG-3-alpha, regeneRating islet-derived 3 alpha, RegeneRating islet-derived protein III-alpha, REG-III
Reactivity:	Rat
Detection Method:	Sandwich ELISA, Double Antibody
Sensitivity:	0.938ng/ml
Range:	1.56-100ng/ml
Storage:	4°C for 6 months
Note:	For Research Use Only

Recovery:

Matrices listed below were spiked with certain level of Rat Reg3a and the recovery rates were calculated by comparing the measured value to the expected amount of Rat Reg3a in samples.

Matrix	Recovery range(%)	Average(%)
serum(n=5)	87-102	94
EDTA plasma(n=5)	91-103	98
UFH plasma(n=5)	87-101	95

Linearity:

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Rat Reg3a 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)	85-97%	86-104%	87-104%
EDTA plasma(n=5)	82-101%	88-101%	87-97%
UFH plasma(n=5)	84-99%	84-92%	80-90%

Intra-Assay:

CV <8%

Inter-Assay:

CV <10%

Uniprot:

P35231

UniProt Protein Function:	REG3A: Might be a stress protein involved in the control of bacterial proliferation.
UniProt Protein Details:	Protein type:Secreted; Secreted, signal peptide Cellular Component: extracellular region Molecular Function:carbohydrate binding Biological Process: acute-phase response; negative regulation of keratinocyte differentiation
NCBI Summary:	lectin-related secretory protein; overexpressed during the acute phase of pancreatitis [RGD, Feb 2006]
UniProt Code:	P35231
NCBI GenInfo Identifier:	224994175
NCBI Gene ID:	171162
NCBI Accession:	NP_001139318.1
UniProt Related Accession:	P35231
Molecular Weight:	20.5 kDa
NCBI Full Name:	regenerating islet-derived protein 3-alpha
NCBI Synonym Full Names:	regenerating islet-derived 3 alpha
NCBI Official Symbol:	Reg3a
NCBI Official Synonym Symbols:	Pap2; PapII
NCBI Protein Information:	regenerating islet-derived protein 3-alpha
UniProt Protein Name:	Regenerating islet-derived protein 3-alpha
UniProt Synonym Protein Names:	Islet of Langerhans regenerating protein 3; REG 3
Protein Family:	Regenerating islet-derived protein
UniProt Gene Name:	Reg3a
UniProt Entry Name:	REG3A_RAT

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.