Electron microscope studies of frozen‐substituted marine eggs. III. Structure of the mitotic apparatus of the first meiotic division
作者:
L. I. Rebhun,
G. Sander,
期刊:
American Journal of Anatomy
(WILEY Available online 1971)
卷期:
Volume 130,
issue 1
页码: 35-53
ISSN:0002-9106
年代: 1971
DOI:10.1002/aja.1001300104
出版商: Wiley Subscription Services, Inc., A Wiley Company
数据来源: WILEY
摘要:
AbstractEggs of the clamSpisula solidissimawere studied by freeze‐substitution techniques at the time of the first meiotic division. The mitotic apparatus is organized into regions containing microtubules, endoplasmic reticulum, ribosomes and mitochondria which surround densely stained amorphous regions. The amorphous regions, which appear to be channels running through the mitotic apparatus, are radially arranged in the asters and are parallel to the spindle axis. Microtubule‐associated particles, each about 250 Å in diameter, are arranged in crystalline arrays around the microtubules of the mitotic apparatus. After a period of time in hypertonic sea water the mitotic apparatus disappears and the microtubule‐associated particles remain aggregated in hexagonally packed crystals. Histochemical tests suggest that the particles are composed of polysaccharide material. Other particles and inclusions show orientation relative to the mitotic apparatus axis or show non‐uniform localization in the egg. The possible meaning of such localization and orientation in the physiology of the egg is d
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