This process involves the polymerization of one or more glycosaminoglycan chains via a xylose link onto S residues on the protein. The sugars in glycosaminoglycans are heavily sulfated in the Golgi. Proteoglycans are important components of the cell s extracellular matrix and will be further studied later in the course. Sphingomyelin and glycolipids are synthesized from ceramide in the Golgi. Transport from the TGN to lysosomes.
Lysosomes contain acid hydrolyses.
Lysosomal pH about 5. Lysosomes are very heterogeneous. Vacuoles are the lysosome functional equivalent in plant cells. Autophagy , or the gradual turn over of the cell s own components. Sorting of soluble lysosomal hydrolyses.