Human Latent TGF-beta 1 ELISA Kit
For detection and measurement of human latent transforming growth factor-beta 1
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Overview
The assay is based on the sandwich ELISA method, in which samples are added to ELISA strip plates pre-coated with capture antibodies specific for the cytokine. The captured cytokine is detected by addition of a biotinylated detection antibody, followed by streptavidin-horseradish peroxidase, which binds the biotinylated antibody. Addition of the chromogenic enzyme substrate 3,3’,5,5’ tetramethylbenzidine (TMB) results in a colored product with an intensity directly proportional to the concentration of cytokine in the sample. The concentration of the cytokine is determined by comparison to a serial dilution of the cytokine standard analyzed in parallel.
Data Figures

Representative Standard Curve
• Reportable range: 0.32 - 32 pM. This is the concentration range in which measurement of the analyte can be done with the highest precision, accuracy, and linearity. Recombinant human LAP (latency associated protein) homodimer is the analyte standard of this ELISA. Determination of latent TGF-β1 using the standard curve is based on a molar comparison. 1 pM LAP (54 pg/mL) corresponds to 1 pM latent TGF-β1 (80 pg/mL).
• Sensitivity: The limit of detection of this assay is 0.13 pM. This is the analyte concentration with absorbance two standard deviations higher than the zero standard.
• Recovery: A mid-curve recovery of 100% was determined by dilution of plasma samples in repeated experiments.
• Precision: The intra-assay precision of this assay is 3.0% (CV). The inter-assay precision of this assay is 10.4% (CV).
Protocols and Documentation
Find supporting information and directions for use in the Product Information Sheet or explore additional protocols below.
Applications
This product is designed for use in the following research area(s) as part of the highlighted workflow stage(s). Explore these workflows to learn more about the other products we offer to support each research area.
Resources and Publications
Educational Materials (2)
Quality Statement:
PRODUCTS ARE FOR RESEARCH USE ONLY AND NOT INTENDED FOR HUMAN OR ANIMAL DIAGNOSTIC OR THERAPEUTIC USES UNLESS OTHERWISE STATED. FOR ADDITIONAL INFORMATION ON QUALITY AT STEMCELL, REFER TO WWW.STEMCELL.COM/COMPLIANCE.