Qualitative Experiments1 Colour Reactions of ProteinsProteins are made of amino acid residues joined through peptide bonds. Due to their polypeptide shape and distinctive amino acid residues, protein reacts with a number of reagents to shape colored merchandise. These checks, referred to as coloration reactions of proteins, are of significance in qualitative detection and quantitative estimation of proteins, and in their constituent amino acids in frame fluids and different organic materials.Proteins and amino acids utilized in distinctive experiments:1. Egg albumin is an egg protein, that's soluble in water.2. Casein is the principal protein in milk. It is a phosphoprotein with phosphate agencies connected to the hydroxyl agencies or serine and threonine residues. It is poor in cysteine.three. Gelatin is shaped from collagen, the connective tissue protein, through boiling with water. It is a wealthy supply of amino acid glycine. It is poor in tyrosine, tryptophan and cysteine.four. Metaproteins, proteoses and peptones are in part hydrolysed merchandise of proteins like albumins and globulins.
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