Arabinogalactan-Proteins: Key Regulators at the Cell Surface?

Arabinogalactan-proteins (AGPs) are undoubtedly one of the most complex families of macromolecules found in plants, perhaps matched only by the polyphenolics (lignins/cutins/suberins) and pectins. Their complexity arises from the incredible diversity of the glycans decorating the protein backbone,