title: An electron microscopic cytochemical study on concanavalin A binding sites and their mobility in normal and cystic fibrosis fibroblasts in vitro.
abstract: Concanavalin A (Con A) binding sites were visualized ultrastructurally in the cultured fibroblasts from cystic fibrosis patients, obligatory heterozygotes, and normal individuals by peroxidase labeling technique. Con A binding sites were localized as a continuous layer on the external side of the plasma membrane in fixed fibroblasts of the three genotypes. In living cells, Con A induces both lateral and vertical movements of binding sites as expressed by cap formation and internalization of the plasma membrane. Fibroblasts of the three genotypes responded similarly to Con A treatment and failed to show significant detectable differences.
mesh_terms: D001665:Binding Sites; D003208:Concanavalin A / Q000378:metabolism* / Q000494:pharmacology; D003550:Cystic Fibrosis / Q000378:metabolism* / Q000473:pathology; D005347:Fibroblasts / Q000187:drug effects / Q000378:metabolism / Q000648:ultrastructure; D006579:Heterozygote; D006651:Histocytochemistry; D006720:Homozygote; D006801:Humans; D066298:In Vitro Techniques; D013696:Temperature
chemical_list: D003208:Concanavalin A