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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 complex molecules, the color reaction is due to groups present in it like benzene ring which is responsible for the yellow precipitate formed with nitric acid (Xanthoproteic test). The principle is nitration of the benzene ring forming a complex colored product which is yellow
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Is protein a chemical reaction?
Proteins are chemical compounds, not reactions.
What attaches a protein to catalyze a metabolic reaction?
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.
A protein that can catalyze a chemical reaction?
enzyme
A protein that changes the rate of a chemical reaction?
An enzyme
A chemical reaction in a living cell occurs in the presence of a specific protein molecule?
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 dous it change to during the reaction?
what colour change occurs during the calcium and hydrochloric acid reaction
Is protein a chemical reaction?
Proteins are chemical compounds, not reactions.
A chemical reaction in a living cell occurs in the presence of a specific protein molecule The concentration of this protein molecule remains the same before and after the reaction This protein mole?
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.
What color is a postitive protein test?
The colour would change to a purple, dark purple colour.
What attaches a protein to catalyze a metabolic reaction?
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.
What a protein that can catalyze a chemical reaction?
enzyme
What is a protein that catalyze a chemical reaction?
enzyme
A protein that can catalyze a chemical reaction?
enzyme
What molecule triggers an allergic reaction when it is stimulated?
Protein molecules are the molecules that set off an allergic reaction. Common allergens associated with protein molecules include pollen, dust mites and peanuts.
What color shows that protein is present in food?
Lilac colour.
Protein that changes the rate of a chemical reaction?
enzymes
What is a protein that affects reaction rates?
These are called enzymes.
