A high resolution of a quick-freeze deep-etch rotary shadowed replica of a parasomal sac from which a clathrin-coated preendosomal vesicle has pinched off. The typical clathrin cage structure is preserved. Fractured trichocyst at the lower left. TEM taken on 6/7/88 by C. Schroeder with Zeiss 10A operating at 80kV. Neg. 31,500X. Adapted with permission from the J. Cell Sci. 101:449-461, 1992. The raw film was scanned with an Epson Perfection V750 Pro. This image is best used for quantitative analysis. Additional information available at (http://www5.pbrc.hawaii.edu/allen/).