title: Aggregation of sponge cells. Isolation and characterization of an inhibitor of aggregation receptor from the cell surface.
abstract: From the cell membranes of the sponge Geodia cydonium a component was isolated and purified which inhibits the aggregation factor isolated from the same source; the component was termed anti-aggregation receptor. This molecule was characterized as a glycoprotein (54% neutral carbohydrate) and its molecular weight is in the range of 180,000 One biological site of the anti-aggregation receptor was determined to be D-galactose. Indirect evidence presented seems to indicate that this molecule is present in an active form in aggregation-deficient cells and absent in aggregation-susceptible cells.
mesh_terms: D000818:Animals; D002449:Cell Aggregation / Q000187:drug effects*; D002462:Cell Membrane / Q000502:physiology*; D006157:Guanosine Monophosphate / Q000378:metabolism; D007700:Kinetics; D008565:Membrane Proteins / Q000302:isolation & purification / Q000502:physiology*; D008970:Molecular Weight; D011161:Porifera / Q000502:physiology*
chemical_list: D008565:Membrane Proteins; D006157:Guanosine Monophosphate