👉 Photogelatin is a type of protein crystal that has been used in medical research and pharmaceutical applications to improve the strength, flexibility, and stability of materials. It is composed of a highly ordered arrangement of amino acids, which are typically found in proteins and other macromolecules, and can be manipulated using various techniques such as precipitation, gelation, and crystallization. Photogelatin crystals are produced by adding a solution of calcium chloride (CaCl2) to a solution containing a small
