MicroMolar Cysteine Assay Kit

SKU:BHT16300122
Overview
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MicroMolar Cysteine Assay Kit for micromolar cysteine in biochemical reactions, pharmaceutical products and water samples. Dye R53 fluorescence increases with cysteine and is read at Ex 485 nm / Em 535 nm in 96-well or 384-well plates or cuvettes. One size: 200 samples (96-well).
Assay Target Cysteine concentration
Detection Method Fluorescence
Detection Wavelength Ex 485 nm / Em 535 nm
Plate Format 96/384-well plate or cuvette
Options selector
Catalog no. Size
CYS200 200 assays
Available Options

Select the variant that best fits your experiment. Availability and lead time may vary by option.

  • Options: Size: 200 assays
  • Lead time: options listed in "Availability Content"; other statuses may take longer.
  • Storage: Please contact us to confirm storage conditions.
  • Shipping: Shipped frozen.
  • Upon receipt: store at recommended temperature as soon as possible.
  • Sales terms and conditions: Please review prior to ordering.
Field Specification
Analyte Cysteine
Analyte category Amino Acid
Assay type
  • Concentration Assay
Assay target Cysteine concentration
Assay area Biochemical Quantification
Detection method
  • Fluorescence
Detection wavelength Ex 485 nm / Em 535 nm
Instrument required Plate reader or fluorometer
Plate format 96/384-well plate or cuvette
Storage Please contact us to confirm storage conditions.
Shipping Shipped frozen.
Catalog no. (Mfr.) CYS200
Main SKU BHT16300122
Concentration Assay Kit

Cysteine is widely used as a reducing agent in in vitro experiments. In the body, abnormal cysteine levels are linked to several conditions: cancer, HIV infection, Huntington's disease and cardiovascular disease.

Kit Components

Component CYS200
100 x Dye R53 400 µl

Enough for 200 samples in 96-well plates; cuvettes or 384-well plates may also be used.

Assay Principle

Cysteine increases the fluorescence of dye R53 at 535 nm (excitation 485 nm). Because cysteine oxidizes quickly in air or solution, samples are freshly prepared and read right after mixing with the dye; concentrations come from a linear standard curve.

Specifications

Assay Target Cysteine concentration
Analyte Cysteine
Analyte Category Amino Acid
Assay Type Concentration Assay
Detection Method Fluorescence
Detection Wavelength Ex 485 nm / Em 535 nm
Plate Format 96/384-well plate or cuvette
Instrument Required Plate reader or fluorometer
Standard Range Two-fold dilutions from 0.050 mM to zero
Sample Types Biochemical reactions, pharmaceutical products, environmental water
Compatibility Compatible with HEPES; not compatible with other thiols such as DTT
Size 200 assays
Storage Please contact us to confirm storage conditions.
Shipping Shipped frozen.

Protocol

The manufacturer's protocol describes the procedure and reaction volumes.

  • Cysteine Assay (PDF, see Documents): Covers catalog # CYS200.

Safety & Handling

For Research Use Only (RUO). Not for use in diagnostic or therapeutic procedures. The MicroMolar Cysteine Assay Kit is shipped frozen. Follow standard laboratory safety practices when handling the reagents. Please contact us to confirm storage conditions.
Q.What does this kit measure?
A.It measures cysteine at micromolar concentrations through the increase in fluorescence of dye R53. Other thiols such as DTT interfere, so samples should be free of them.
Q.What is included in the kit?
A.The MicroMolar Cysteine Assay Kit (200 assays) includes 100 x Dye R53 (400 µl).
Q.Is a protocol available?
A.Yes. The manufacturer's protocol (Cysteine Assay, linked under Documents) covers catalog # CYS200.
Q.How should the kit be stored?
A.The MicroMolar Cysteine Assay Kit is shipped frozen. Please contact us for long-term storage conditions.

Can’t find the exact format you need? We can help you source or customize this cysteine concentration assay — including larger pack sizes, bulk reagents, or a protocol adapted to your samples. Click Talk to a Scientist, email support@biohippo.com, or explore our Research Services. Our team will be in touch shortly.

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Experience the power of Celltrypse™, c-LEcta's innovative enzyme solution for gentle and efficient cell dissociation. Request your free sample and discover a superior alternative for your cell culture workflows.

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