sulfo- or phospho-substituted). One of the main function of glycoproteins on the cell membrane is to stabilize the membrane by making hydrogen bonds with the surrounding water molecules. “OSC Microbio 03 04 EukPlasMem” By CNX OpenStax (CC BY 4.0) via Commons Wikimedia, Lakna, a graduate in Molecular Biology & Biochemistry, is a Molecular Biologist and has a broad and keen interest in the discovery of nature related things, What is the Difference Between Peptidoglycan and Glycoprotein, What are the Similarities Between Peptidoglycan and Glycoprotein. It exclusively occurs in the bacterial cell wall, providing structural strength and controlling osmotic pressure. They are also used in cases where there is an allergy to beta-lactams. 1. The extracellular matrix (ECM) is a matrix secreted by the cells in a tissue, that provides structural and biochemical support to all the cells of that tissue.