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Fig. 22: serial section to Figure 21

Serial section to Figure 21 at higher magnification. In this micrograph the two acidosomes (ac) seem to be attached to the posterior side of the ribbon. The discoidal vesicles maintain a distance of 40nm from the ribbon which represents the length of cytoplasmic dynein arms. We reported that in Paramecium vesicles move in one direction along one side of the ribbons and in the opposite direction on the reverse side (Schroeder, Fok and Allen, J. Cell Biol. 111:2553-2562, 1990). EM taken on 8/16/80 by R. Allen with Hitachi HU11A TEM. Neg. 12,250X. Bar = 0.5µm. Published in Paramecium, H.-D. Gortz, Springer-Verlag, Berlin, p.320, 1988.
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