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In other words, the extracellular matrix largely determines how a tissue looks and functions. The extracellular matrix is made up of proteoglycans, water, minerals, and fibrous proteins. A proteoglycan is composed of a protein core surrounded by long chains of starch-like molecules called glycosaminoglycans.
And in the cellâ¦. And so it is with a cell and the extracellular matrix and cell adhesion molecules around it. Many properties of the cell surface and internal functions of the cell are dependent on proteins that extend from the cell surface into the ECM or to the surface of other cells.