Product Name:	Human GAS 6 / Growth arrest-specific protein 6 ELISA Kit
Product Code:	HUFI00444
Size:	96 Assays
Alias:	GAS6, Growth arrest-specific protein 6, AXLLG, AXLLGAXL stimulatory factor, AXSFAXL receptor tyrosine kinase ligand, GAS-6, growth arrest-specific 6
Detection method:	Sandwich ELISA, Double Antibody
Application:	This immunoassay kit allows for the in vitro quantitative determination of Human GAS6 concentrations in serum plasma and other biological fluids.
Sensitivity:	37.5pg/ml
Range:	62.5-4000pg/ml
Storage:	4°C for 6 months
Note:	For Research Use Only

Recovery:

Matrices listed below were spiked with certain level of Human GAS6 and the recovery rates were calculated by comparing the measured value to the expected amount of Human GAS6 in samples.

Matrix	Recovery range(%)	Average(%)
serum(n=5)	87-105	95
EDTA plasma(n=5)	92-103	98
UFH plasma(n=5)	85-102	94

Linearity:

The linearity of the kit was assayed by testing samples spiked with appropriate concentration of Human GAS6 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)	90-101%	92-104%	86-105%
EDTA plasma(n=5)	83-96%	82-97%	82-101%
UFH plasma(n=5)	81-97%	86-95%	85-97%

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

Q14393

UniProt Protein Function:	GAS6: Ligand for tyrosine-protein kinase receptors AXL, TYRO3 and MER whose signaling is implicated in cell growth and survival, cell adhesion and cell migration. GAS6/AXL signaling plays a role in various processes such as endothelial cell survival during acidification by preventing apoptosis, optimal cytokine signaling during human natural killer cell development, hepatic regeneration, gonadotropin-releasing hormone neuron survival and migration, platelet activation, or regulation of thrombotic responses. 4 isoforms of the human protein are produced by alternative splicing.
UniProt Protein Details:	Protein type:Ligand, receptor tyrosine kinase; Secreted; Secreted, signal peptide Chromosomal Location of Human Ortholog: 13q34 Cellular Component: cytoplasm; endoplasmic reticulum lumen; extracellular region; extracellular space; Golgi lumen Molecular Function:calcium ion binding; caspase inhibitor activity; molecular adaptor activity; phosphatidylserine binding; protein binding; protein tyrosine kinase activator activity; receptor agonist activity; receptor binding; receptor tyrosine kinase binding; voltage-gated calcium channel activity Biological Process: activation of protein kinase B; apoptotic cell clearance; blood coagulation; cell adhesion; cell cycle arrest; cell migration; cell proliferation; cell-substrate adhesion; cellular protein metabolic process; cellular response to starvation; entry of virus into host cell; enzyme linked receptor protein signaling pathway; ER to Golgi vesicle-mediated transport; leukocyte migration; negative regulation of apoptosis; negative regulation of caspase activity; negative regulation of interferon-gamma production; negative regulation of interleukin-1 secretion; negative regulation of interleukin-6 production; negative regulation of protein import into nucleus, translocation; negative regulation of transcription factor activity; negative regulation of transcription, DNA-dependent; negative regulation of tumor necrosis factor production; neuron migration; organ regeneration; peptidyl-glutamic acid carboxylation; peptidyl-serine phosphorylation; phagocytosis; platelet activation; platelet degranulation; positive regulation of cytokine and chemokine mediated signaling pathway; positive regulation of fibroblast proliferation; positive regulation of glomerular filtration; positive regulation of natural killer cell differentiation; positive regulation of peptidyl-serine phosphorylation; positive regulation of phagocytosis; positive regulation of protein amino acid phosphorylation; positive regulation of protein export from nucleus; positive regulation of protein kinase activity; positive regulation of protein kinase B signaling cascade; positive regulation of TOR signaling pathway; post-translational protein modification; protein amino acid phosphorylation; protein kinase B signaling cascade; regulation of growth; signal peptide processing; signal transduction; viral envelope fusion with host membrane; viral genome replication; virion attachment, binding of host cell surface receptor
NCBI Summary:	This gene encodes a gamma-carboxyglutamic acid (Gla)-containing protein thought to be involved in the stimulation of cell proliferation. This gene is frequently overexpressed in many cancers and has been implicated as an adverse prognostic marker. Elevated protein levels are additionally associated with a variety of disease states, including venous thromboembolic disease, systemic lupus erythematosus, chronic renal failure, and preeclampsia. [provided by RefSeq, Aug 2014]
UniProt Code:	Q14393
NCBI GenInfo Identifier:	48427995
NCBI Gene ID:	2621
NCBI Accession:	Q14393.2
UniProt Secondary Accession:	Q14393,Q6IMN1, Q7Z7N3, B3KRQ7, B3KVL4, E9PBL7,
UniProt Related Accession:	Q14393
Molecular Weight:	41,986 Da
NCBI Full Name:	Growth arrest-specific protein 6
NCBI Synonym Full Names:	growth arrest specific 6
NCBI Official Symbol:	GAS6Ã‚ Ã‚
NCBI Official Synonym Symbols:	AXSF; AXLLGÃ‚ Ã‚
NCBI Protein Information:	growth arrest-specific protein 6
UniProt Protein Name:	Growth arrest-specific protein 6
UniProt Synonym Protein Names:	AXL receptor tyrosine kinase ligand
Protein Family:	Growth arrest-specific protein
UniProt Gene Name:	GAS6Ã‚ Ã‚
UniProt Entry Name:	GAS6_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 Ã‚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 Ã‚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 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.