Call 408.493.1800 | Fax 408.493.1801 | Toll Free 800.891.9699 (US Only) | Email: [email protected]

Hydroxyproline Assay Kit (Perchlorate-Free)

This kit does not use PCA to detect and quantify Hydroxyproline
Catalog #: K226

Product Details

Cat # +Size K226-100
Size 100 Reactions
Kit Summary • Detection method- Absorbance (560 nm)
• Species reactivity- Mammalian
• Applications- The assay is useful over the range of 0.1-1 μg.
Detection Method Absorbance (OD = 560 nm).
Species Reactivity Mammalian
Applications Estimation of hydroxyproline concentration in various biological samples
Features & Benefits • Simple procedure; takes less than ~60 minutes
• Convenient and easy to use
• Faster than Perchlorate-Based Assay
• PCA-free
Kit Components • Oxidation Buffer
• Chloramine T Concentrate
• Developer Solution
• DMAB Concentrate (in DMSO)
• Hydroxyproline Standard (1 mg/ml)
• Microplate Sealing Film
Storage Conditions -20°C
Shipping Conditions Gel Pack
USAGE For Research Use Only! Not For Use in Humans.


Hydroxyproline ((2S,4R)-4-hydroxyproline, Hyp) is a nonproteinogenic amino acid formed by the enzyme prolyl-4-hydroxylase, which catalizes the post-translational modification of polypeptide proline residues following protein synthesis. In animals, hydroxyproline is found almost entirely in collagen, which contains approximately 12-14% hydroxyproline by mass (the fibrilous protein elastin also contains small quantities of hydroxyproline). Hydroxyproline in tissue hydrolysates is thus a direct measure of the amount of collagen present. Collagen is the most abundant protein in mammals and many diseases are believed to affect collagen turnover, including tumor invasion and metastasis, rheumatoid arthritis, cardiopulmonary fibrosis and muscular dystrophy. The classical assay for determination of Hyp is based upon oxidation of Hyp to a pyrrole intermediate, followed by reaction with Ehrlich’s reagent dissolved in concentrated perchloric acid (HClO4). Perchloric acid is a hazardous material that is both toxic and highly reactive, requiring special handling and waste-disposal protocols. BioVision’s Hydroxyproline Assay Kit II (Perchlorate-Free) uses a proprietary acidic developer solution to accurately measure Hyp in tissue and protein/peptidase hydrolysates without the use of hazardous perchlorates. It is a quick and convenient protocol, yielding a brightly-colored chromophore with an absorbance peak at 560 nm. The assay can detect a minimum of 0.05 µg hydroxyproline per well in a 96-well format and generates colorimetric results that are virtually identical to the classical perchloric acid-based method.

Why buy BioVision Products?
Global Presence
Technical Support
BioVision aims to provide our customers innovative tools for accelerating drug discovery and biological research. BioVision offers >8,000 products including the most comprehensive array of assay kits for key targets in Metabolic pathways.
BioVision is committed to providing the highest quality products at a competitive price.
We have a broad network of global distributors who are ready to address your research needs and ensure fast delivery.
Our highly trained Technical Support team provides comprehensive product support and is dedicated to resolving your issues quickly and efficiently.
In the protocol, it is recommended to use vials with screwcaps (BV Cat# M1352 and M1353). However, we want to set the assay on a 96-well plate. Do you know what type of plate should we use that would be equivalent to these tubes?
It is not possible to use 96 well plates for the hydrolysis step as you need to do it in a tightly sealed tube to avoid evaporation during high temperature.
How is K226 different from K555?
K226 follows alkaline hydrolysis and it is percholate free where as K555 follows acid hydrolysis protocol. They are both different in the method used to hydrolyze tissue. Alkaline hydrolysis is less time consuming than acid based hydrolysis.
Wang, M., Et al., (2017) , Increasing Dietary Medium-Chain Fatty Acid Ratio Mitigates High-fat Diet-Induced Non-Alcoholic Steatohepatitis by Regulating Autophagy, Sci. Rep., 2017, 7: 13999
For more citations of this product click here