Fig 6.

Immunogold EM analysis using Abs against Sto1a,b,cp. Label occurs as a small patch (microdomain) on a cross-sectioned cell membrane (cm, arrowhead) (A) and is more extended on a tangential section (encircled) close to underlying alveolar sacs (as) (B). (C) Outlines of a clathrin-coated parasomal sac (ps) are labeled. (D) Gold label on the membranes of two subcortical Ca²⁺ stores (as) but not on a cilia (ci). (E) Label is diffusely associated with a population of small vesicles which, as seen from the neighboring of alveolar sacs, are located below the cell surface. For further details, see Materials and Methods. Scale bars, 0.1 μm.