The principle behind colorimetric protein assays is that the presence of proteins can react with specific reagents to produce a color change that can be measured spectrophotometrically. For example, the Biuret reaction involves the formation of a copper-protein complex that absorbs light at a specific wavelength. The Bradford assay is based on the binding of Coomassie Brilliant Blue dye to basic and aromatic amino acid residues in proteins, resulting in a color change that can be quantified.
Proteins are chemical compounds, not reactions.
A cofactor or coenzyme can attach to a protein to help catalyze a metabolic reaction by facilitating the reaction or acting as a carrier of chemical groups. These molecules can be inorganic ions, organic molecules, or other proteins that work together with the protein to enable the reaction to occur.
enzyme
An enzyme
The specific protein molecule in a cell acts as a catalyst, facilitating the chemical reaction to occur more efficiently or at a faster rate. The protein molecule binds with the reactants, stabilizes the transition state, and lowers the activation energy required for the reaction to proceed. Without the presence of this protein molecule, the reaction may occur, but at a significantly slower rate.
what colour change occurs during the calcium and hydrochloric acid reaction
Proteins are chemical compounds, not reactions.
This protein molecule is likely an enzyme, which facilitates the chemical reaction by lowering the activation energy required for the reaction to occur. Enzymes remain unchanged after the reaction and can be reused to catalyze multiple reactions. They are specific to the reaction they catalyze and are essential for the proper functioning of the cell.
The colour would change to a purple, dark purple colour.
A cofactor or coenzyme can attach to a protein to help catalyze a metabolic reaction by facilitating the reaction or acting as a carrier of chemical groups. These molecules can be inorganic ions, organic molecules, or other proteins that work together with the protein to enable the reaction to occur.
enzyme
enzyme
enzyme
Protein molecules are the molecules that set off an allergic reaction. Common allergens associated with protein molecules include pollen, dust mites and peanuts.
Lilac colour.
Protein
enzymes