New—The Qubit™ 4 Fluorometer can now measure RNA quality in addition to providing accurate quantitation of dsDNA, ssDNA, RNA & protein.

Qubit™ Protein Assay Kit

Catalog number:  Q33211

Related applications:

Protein Assays and Analysis

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The Qubit Protein Assay Kit is designed specifically for use with the Qubit Fluorometer. Using between 1 and 20 µl of your sample, this assay can quantitate samples ranging from 12.5 µg⁄ml to 5 mg⁄ml and exhibits low protein to protein variation. The assay is highly selective for proteins and is designed to be accurate in the presence of reducing reagents, but not in the presence of a large amount of detergent. Common contaminants, such as reducing reagents (DTT, β-mercaptoethanol), salts, free nucleotides, amino acids, solvents, or DNA, but not detergents, are well tolerated in the assay. Slight protocol modifications are required for other contaminants. The kit provides concentrated assay reagent, dilution buffer, and pre-diluted BSA standards. Simply dilute the reagent using the buffer provided, add your sample (any volume between 1 µL and 20 µL is acceptable), and read the concentration.

Which product to choose for fluorometric protein quantitation?
• For 1–20 samples: use this Qubit Protein Assay Kit with the Qubit Fluorometer
• For 20–2000 samples: use the Quant-iT Protein Assay Kit with microplate reader

1. All Qubit assay kits can be used with the Qubit 1.0, Qubit 2.0, Qubit 3, and Qubit 4 fluorometers.
2. 500 µL thin-walled PCR tubes are required but not included.
For Research Use Only. Not for use in diagnostic procedures.


Quantitation Range: 0.25-5 µg
Quantity: 100 reactions
Assay: Protein Quantitation Assay
Shipping Condition: Room Temperature
Product Line: Quant-iT™, Qubit™
Detection Method: Fluorescent
For Use With (Equipment): Qubit™ Fluorometer, Microplate Reader

Contents & storage

Store in refrigerator (2–8°C) and protect from light.

Note: 500 µL thin-walled PCR tubes are required but not included.