Agarose is a polysaccharide derived from seaweed belonging to the genus Gelidium and Gracilaria. It is a linear polymer made up of repeating units of agarobiose—a disaccharide consisting of D-galactose and 3,6-anhydro-L-galactopyranose. In histology, agarose is widely used due to its ability to form gels at low concentrations, which are useful for a range of applications.
