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Higher magnification of another crushed mitochondrion showing the
zipper-like row of 9nm diameter particles (arrows) on the outer
curve of the cristae and the single row of larger particles
(arrowheads) on the inner curve. There is an average of 1500
particles per square micrometer of 50-nm tubular cristae surface on
the outer curve. These particles are thought to be the F1
units of the F1F0 ATP synthases of the
mitochondria. The larger particles on the inner curve resemble complex
I of the respiratory electron transport chain in size and relative
abundance when compared to their relative quantities estimated from
biochemical studies in other cells such as beef heart. This shows the
highly ordered arrangement of some of the molecules of the oxidative
phosphorylation and electron transport systems in Paramecium.
EM taken on 5/6//88 by C. Schroeder with Zeiss 10A TEM. Neg. 63,000X.
Bar = 0.1µm. Published in J. Cell Biol. 108:2233-2240, 1989.
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