The Bradford Reagent is a colourimetric assay reagent widely used for the quantification of protein concentration in a sample. Based on the binding of Coomassie Brilliant Blue G-250 dye to proteins, the Bradford assay is a rapid and sensitive method that produces a colour change from brown to blue in the presence of proteins. This reagent is ideal for determining protein concentrations in a variety of samples, including cell lysates, tissue homogenates, and purified protein solutions, and is compatible with microplate readers and spectrophotometers.