Qualitative tests are the primary assays for detecting the presence of any
protein in a given sample. Qualitative detection of proteins is based on the chemical
interactions between amino acids and certain chemical reagents added to them. These
chemical reactions yield colour formation, which corresponds to specific amino acid or
a group of amino acids present in the sample. In this chapter, some of such most
important assays for qualitative analysis are discussed in detail.
Keywords: Amino acid, Assay, Protein.
