Collagen Proteins

August 07, 2024

Collagens as Antibody Controls

It cannot be understated that the appropriate controls should be included in experimental design when type-specific anti-collagen antibodies are used to ensure the success of the experiment and data reproducibility. Only highly purified and type-specific collagen proteins should be used as controls that are themselves free of impurities, including serum proteins, other collagen proteins, and non-collagen extracellular matrix proteins. Standards must not only be physically pure for collagen but also be immunologically pure for the type of collagen to be used as controls in experiments of this type. Type-specific anti-collagen antibodies should be selected that are appropriate for the detection of collagens present in the tissue to be tested, and these antibodies should be used with protocols designed to optimize antibody performance for the collection of high-quality data ultimately intended to help better understand the biology of these proteins.

 

Human Collagen Proteins

Product Origin Applications
Human Collagen Type I Human SDS-PAGE, WB, Cellular Assay
Human Collagen Type II Human SDS-PAGE, WB
Human Collagen Type III Human SDS-PAGE, WB
Human Collagen Type IV Human SDS-PAGE, ELISA
Human Collagen Type V Human SDS-PAGE
Human Collagen Type VI Human SDS-PAGE, Cellular Assay

 

Bovine Collagen Proteins

Product Origin Applications
Bovine Collagen Type I Bovine SDS-PAGE, WB
Bovine Collagen Type II Bovine SDS-PAGE
Bovine Collagen Type III Bovine SDS-PAGE
Bovine Collagen Type IV Bovine SDS-PAGE
Bovine Collagen Type V Bovine SDS-PAGE
Bovine Collagen Type VI Bovine  

 

Frequently Asked Questions

Collagen proteins are purified from various sources including bovine or human placenta, skin, nasal tissue, and knee cartilage. The purity of the protein is analyzed by SDS-PAGE.
The proteins were purified by a proprietary method that includes mechanical separation and salt precipitation. Due to the nature and close association of certain collagen proteins, it is difficult to fully separate each collagen.
Collagen proteins are provided in liquid format at a concentration of around 1 mg/mL. The collagen proteins are solubilized, maintaining their native structure. No enzymatic treatment is performed. The low pH of the buffer is essential in maintaining the solubility of the collagen protein.
0.5 M Acetic Acid, pH 2.5 with 0.01% (w/v) Sodium Azide.
The recommended buffer for SDS-PAGE is 2X SDS buffer with 8 M Urea. The low pH of the buffer maintains the solubility of the collagen proteins. Also, low-density gels such as 3-8% Tris Acetate should be used. Collagen proteins can be reduced with DTT.
Collagen proteins should always be stored at 4°C. It is important to never let the collagen proteins freeze because this will degrade the protein. Please be sure to maintain 4°C temperature during assays such as SDS-PAGE.
The concentration of the collagen proteins was measured by absorbance via nanodrop at 205 nm. When measuring concentration, please be sure to blank with the same buffer as the protein product (0.5 M Acetic Acid).
Since no testing for endotoxin or other contaminants was performed, we do not recommend the use of this product for cell culture.