title: Specificity of cell-cell interactions in sea urchin embryos. Appearance of new cell-surface determinants at gastrulation.
mesh_terms: D000367:Age Factors; D000818:Animals; D000937:Antigen-Antibody Reactions; D000941:Antigens / Q000032:analysis; D002448:Cell Adhesion; D002449:Cell Aggregation; D002459:Cell Fusion; D002462:Cell Membrane / Q000276:immunology; D007140:Immunoglobulin Fab Fragments; D008854:Microscopy, Electron; D012617:Sea Urchins / Q000196:embryology* / Q000648:ultrastructure; D013045:Species Specificity
chemical_list: D000941:Antigens; D007140:Immunoglobulin Fab Fragments