PROGRESS IN PROTOZOOLOGY
PROGRESS IN PROTOZOOLOGY
PROGRESS IN PROTOZOOLOGY
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Fig. 5. Tangentional sectio n through the surface of an exocytotically normal<br />
Paramecium tetraurelia cell (strain 7S) after performance of a Ca 2 +-ATPase<br />
reaction. Only the trichocyst attachment sites are positive; numbers 1-7 indicate<br />
different sectioning levels (6 and 7 being negative because of being cut at too<br />
low a level). 39 000X. From Plattner et al. (1980)<br />
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