extensin
protein
Quick Summary
Extensin is a structural glycoprotein found in the plant cell wall. It is a key component of the primary cell wall, which is laid down by growing plant cells. Extensin molecules are secreted into the cell wall and become cross-linked, contributing to the wall's structural integrity and influencing the cell's ultimate size. While plant cell walls are primarily composed of cellulose fibers, they also contain matrix polysaccharides like hemicelluloses and pectins, as well as proteins like extensin.1
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