Abstract
Carbohydrate-directed endocytosis is mediated by a receptor, the hepatic binding protein; it is responsible for the clearance of galactose-terminated glycoproteins from the circulation. This process was investigated by using lactosaminated ferritin which is recognized by this receptor. Ferritin was seen in elements of an extensive "lysosomal compartment" that includes secretory vacuoles, coated vesicles, and GERL. The compartment marked in hepatocytes by the distribution of ligand is similar to that previously described in Kupffer cells (marked by acid phosphatase reaction product and horseradish peroxidase reaction product).
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