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Updated: Jul 11, 2026

Plunge Freezing: A Tool for the Ultrastructural and Immunolocalization Studies of Suspension Cells in Transmission Electron Microscopy
Published on: May 5, 2017
Ultrastructural analysis and identification of membrane proteins in the free-living amoeba Difflugia corona
Marcelo Silva-Briano1, Sandra Luz Martínez-Hernández, Araceli Adabache-Ortíz
1Dept. of Biology, Centro de Ciencias Básicas, Universidad Autónoma de Aguascalientes. Av. Universidad 940 C.P. 20100. Aguascalientes Ags, México.
Abstract:
Syntaxin-1 and 25-kDa Synaptosome-associated Protein (SNAP-25) are present in the plasma membrane of several different secretory cell types and are involved in the exocytosis process. In this work, the free-living amoeba Difflugia corona was studied in relation to ultrastructure, structural membrane proteins, and proteins such as Syntaxin-1 and SNAP-25. Our results obtained by scanning electron microscopy in the amoeba without its theca, showed many membrane projections and several pore-like structures. Using immunocytochemistry, we found structural proteins Syntaxin-1 and SNAP-25.

