spacer gif spacer gif spacer gif spacer gif spacer gif
QUICK SEARCH:   [advanced]


spacer gif
     Home     Help     Feedback     Subscriptions     Archive     Search     Table of Contents    

Right arrow Help viewing high resolution images
Right arrow Return to article

(Downloading may take up to 30 seconds.
If the slide opens in your browser, select File -> Save As to save it.)
Click on image to view larger version.


Figure 1


Fig. 1. Electron micrographs of `studs', the globular headpieces of the V1 complex of the V-type H+ ATPase. (a) Stereoelectron micrograph of a vesicle from the apical region of a mitochondria-rich cell after rapid freezing and freeze-drying of apical membrane segments of toad urinary bladder (courtesy of D. Brown, Boston). (b) Negative stained electron micrograph of a vesicle after purification of goblet cell apical membranes from the midgut of the tobacco hornworm (courtesy of M. Huss and H. Wieczorek, Osnabrück). The diameter of `studs' (portasomes) is approximately 10 nm. The average density is about 16 800 studs µm-2 of membrane in the toad urinary bladder (Brown et al., 1987) and about 5000 µm-2 in the tobacco hornworm.





Right arrow Return to article