<Li> Coomassie Blue once binding to proteins elicits a spectrum shift, allowing quantitative dosage . A similar colorimetric assay, the Bicinchoninic acid assay, uses a chemical reaction to determine protein concentration . </Li> <Li> Enzyme linked immunoassays use enzyme - complexed - antibodies to detect antigens . Binding of the antibody is often inferred from the color change of reagents such as TMB . </Li>

What is the common unit of measurement for identifying visual wavelengths