The isoelectric point of lysozyme (which is a protein) was measured. The value obtained coincides well with the one reported in literature. Lysozyme is a form of enzyme that catalyzes the hydrolysis of polysaccharides in vivo. While in vivo, this protein is denatured by changes in temperature and pH, either varying or losing its liveliness. Measuring its dependence on these two parameters thus provides valuable information for the study of enzymatic reactions.