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PicoProbe™ Threonine Assay Kit (Fluorometric)

Market's first and only kit for enzymatic detection of Threonine in biological samples
Catalog #: K463

Product Details

Cat # +Size K463-100
Size 100 assays
Kit Summary • Detection method- Fluorescence (Ex/Em 535/587 nm)
• Application- Measurement of Threonine in biological samples such as serum, plasma, CSF, etc.
Detection Method Fluorescence (Ex/Em: 535/587 nm)
Species Reactivity Mammalian
Applications Estimation of Threonine in various biological samples
Features & Benefits • Simple, rapid & convenient assay
• Limit of detection: 2 µM
• Very specific, does not interact with other standard and non-standard amino acids
Kit Components • Threonine Assay Buffer
• PicoProbeTM Solution
• Threonine Enzyme Mix
• Developer Enzyme Mix
• L-Threonine Standard
Storage Conditions -20°C
Shipping Conditions Gel Pack
USAGE For Research Use Only! Not For Use in Humans.


Threonine is one of the 20 naturally-occuring amino acids used by all organisms in the biosynthesis of proteins and is an essential dietary amino acid for humans. Threonine residues in proteins are subject to post-translational phosphorylation, a critical regulatory and signal transduction mechanism. In addition to its role as a protein building block, threonine can serve as a precursor to other amino acids and metabolites, including glycine, isoleucine and acetyl-coenzyme A. Recent research has shown that threonine is a vital nutrient for embryonic stem cells and threonine metabolism (mediated by the enzyme threonine dehydrogenase) is required for unlimited self-renewal and maintenance of stem cell pluripotency. Dietary threonine deficiency, while rare, can result in breakdown of the intestinal mucosal lining (eventually triggering inflammatory bowel disorders), immunosuppression and a multitude of neuropsychiatric symptoms. BioVision’s Threonine Assay Kit allows for highly sensitive quantification of L-Threonine levels in biological fluids and tissues. The assay is based on the selective, NAD+-coupled enzymatic metabolism of threonine, yielding an oxidized intermediate and NADH. A developer enzyme mixture utilizes the NADH generated to convert PicoProbe™ into a stable fluorophore (Ex/Em = 538/587 nm). The assay is not affected by physiological concentrations of other amino acids, is high-throughput adaptable and can detect threonine levels down to 2 μM in samples

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