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Human SCF Quantikine ELISA Kit

R&D Systems, part of Bio-Techne | Catalog # DCK00

R&D Systems, part of Bio-Techne
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DCK00

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Key Product Details

Assay Length

4.5 hours

Sample Type & Volume Required Per Well

Cell Culture Supernates (100 µL), Serum (100 µL), EDTA Plasma (100 µL), Heparin Plasma (100 µL), Citrate Plasma (100 µL)

Sensitivity

9 pg/mL

Assay Range

31.2-2000 pg/mL (Cell Culture Supernates, Serum, EDTA Plasma, Heparin Plasma, Citrate Plasma)

Product Summary for Human SCF Quantikine ELISA Kit

The Quantikine Human SCF Immunoassay is a 4.5 hour solid phase ELISA designed to measure SCF levels in cell culture supernates, serum, and plasma. It contains E. coli-expressed recombinant human soluble SCF (KL-1 variant) and antibodies raised against this recombinant factor. Results obtained for naturally occurring human SCF samples showed linear curves that were parallel to the standard curves obtained using the Quantikine kit standards. These results indicate that this kit can be used to determine relative mass values for natural human SCF.

Product Specifications

Assay Type

Solid Phase Sandwich ELISA

Format

96-well strip plate

Measurement

Quantitative ELISA

Detection Method

Colorimetric - 450nm (TMB)

Conjugate

HRP

Reactivity

Human

Specificity

Natural and recombinant human SCF. This assay cross-reacts 15.6% with Canine SCF, 16.1% with Feline SCF, 3.5% with Mouse SCF and 1.0% with Rat SCF.

Cross-reactivity

< 0.5% cross-reactivity observed with available related molecules. Cross-species reactivity observed with 1 or more species tested.

Interference

No significant interference observed with available related molecules.

Precision

Intra-Assay Precision (Precision within an assay) Three samples of known concentration were tested on one plate to assess intra-assay precision.

Inter-Assay Precision (Precision between assays) Three samples of known concentration were tested in separate assays to assess inter-assay precision.

Cell Culture Supernates

Intra-Assay Precision Inter-Assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 20 20 20
Mean (pg/mL) 153 709 1427 151 729 1552
Standard Deviation 3.6 11.6 61.0 12.1 45.8 125
CV% 2.4 1.6 4.3 8.0 6.3 8.1

Citrate Plasma, EDTA Plasma, Heparin Plasma, Serum

Intra-Assay Precision Inter-Assay Precision
Sample 1 2 3 1 2 3
n 20 20 20 20 20 20
Mean (pg/mL) 139 655 1419 142 703 1574
Standard Deviation 5.5 12.9 54.0 14.6 36.0 94.0
CV% 4.0 2.0 3.8 10.3 5.1 6.0

Recovery for Human SCF Quantikine ELISA Kit

The recovery of SCF spiked to levels throughout the range of the assay in various matrices was evaluated.

Sample Type Average % Recovery Range %
Cell Culture Media (n=2) 85 75-93
Citrate Plasma (n=8) 94 84-112
EDTA Plasma (n=8) 98 82-110
Heparin Plasma (n=8) 99 88-116
Serum (n=8) 99 87-111

Linearity

To assess the linearity of the assay, the following biological samples were diluted with the appropriate Calibrator Diluent and then assayed. The cell culture media was spiked with exogenous SCF.

Human SCF/c-kit Ligand ELISA Linearity

Scientific Data Images for Human SCF Quantikine ELISA Kit

Human SCF/c-kit Ligand ELISA Cell Culture Supernate Standard Curve

Human SCF/c-kit Ligand ELISA Cell Culture Supernate Standard Curve

Human SCF/c-kit Ligand ELISA Serum/Plasma Standard Curve

Human SCF/c-kit Ligand ELISA Serum/Plasma Standard Curve

Preparation and Storage

Shipping

The product is shipped at ambient temperature. Upon receipt, store it immediately at the temperature recommended below.

Stability & Storage

Store the unopened product at 2 - 8 °C. Do not use past expiration date.

Background: SCF/c-kit Ligand

Stem cell factor (SCF), also known as c-kit ligand (KL), mast cell growth factor (MGF), and steel factor (SLF), is a widely expressed 28 - 40 kDa type I transmembrane glycoprotein. It promotes the survival, differentiation, and mobilization of multiple cell types including myeloid, erythroid, megakaryocytic, lymphoid, germ cell, and melanocyte progenitors. SCF is a primary growth and activation factor for mast cells and eosinophils. Mature human SCF consists of a 189 amino acid (aa) extracellular domain (ECD), a 23 aa transmembrane segment, and a 36 aa cytoplasmic tail. The ECD shows both N-linked and O-linked glycosylation. Proteolytic cleavage at two alternate sites in the extracellular juxtamembrane region releases a 25 kDa soluble molecule which is comparable to the only form produced by Steel-dickie mutant mice. An alternately spliced isoform of human SCF lacks 28 aa that encompasses the primary proteolytic recognition site. Within the ECD of the short isoform (corresponding to this recombinant protein), human SCF shares 75 - 83% aa sequence identity with canine, feline, mouse, and rat SCF. Rat SCF is active on mouse and human cells, but human SCF is only weakly active on mouse cells. Noncovalent dimers of transmembrane or soluble SCF interact with the receptor tyrosine kinase SCF-R/c-kit to trigger receptor dimerization and signaling. SCF assists in the recovery of cardiac function following myocardial infarction by increasing the number of cardiomyocytes and vascular channels.

Long Name

Stem Cell Factor

Alternate Names

c-kit Ligand, DCUA, DFNA69, FPH2, FPHH, KITLG, KL-1, MGF, SHEP7, SLF

Entrez Gene IDs

4254 (Human); 17311 (Mouse); 60427 (Rat); 403507 (Canine); 493937 (Feline)

Gene Symbol

KITLG

Additional SCF/c-kit Ligand Products

Product Documents for Human SCF Quantikine ELISA Kit

Certificate of Analysis

To download a Certificate of Analysis, please enter a lot number in the search box below.

Note: Certificate of Analysis not available for kit components.

Product Specific Notices for Human SCF Quantikine ELISA Kit

For research use only

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⚠ WARNING: This product can expose you to chemicals including N,N-Dimethylforamide, which is known to the State of California to cause cancer. For more information, go to www.P65Warnings.ca.gov.