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. Author manuscript; available in PMC: 2015 Nov 16.
Published in final edited form as: Biochim Biophys Acta. 1982 Dec 8;693(1):93–98. doi: 10.1016/0005-2736(82)90474-6

Fig. 2.

Fig. 2

Comparison of lipidic particles and the intramembranous particles of cells. X60000 . Bar = 2 μm. A. A guinea-pig sperm cell, fixed, cryoprotected with 25% glycerol for 2 h quenched in liquid Freon 22 and frozen in liquid N2, as described [30]. Both large and small (arrows) clearings occupy the site of future sperm-egg fusion . The size of the larger intramembranous particles ringing the clearings as well as the size of the smaller clearings is similar lo the particles and clearings seen in glycerinated, Ca2+ incubated PC : CL liposomes (B).