Microtubules are a general component of mRNA localization systems in Drosophila oocytes

Article Abstract:

Experimental studies using inhibitors of cytoskeletal functions reveal that the localization of bicoid RNA to the anterior oocyte margin during Drosophila oogenesis requires microtubules. The influence of microtubule inhibitors differs for different RNAs and addition of taxol, a microtubule stabilizing agent, exerts different influences on localized RNAs. The position of localized RNA is maintained by both microtubules and other factors. Accumulation of RNAs in previtellogenic oocyte is favored by microtubules, indicating the involvement of microtubule-dependent mechanism in the transport of mRNA to the oocyte.

Research, Genetic aspects, Drosophila, Microtubules, Messenger RNA

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Identification and partial characterization of yolk and cortical granule proteins in eggs and embryos of the starfish, Pisaster ochraceus

Article Abstract:

Immunohistochemical studies at the light and transmission electron microscope levels help study the ultrastructural positioning and developmental fates of two new monoclonal antibodies, PC3H2 and PY4F8, against starfish oocyte yolk and cortical granules. Cortical granules are identified by PC3H2 while PY4F8 identifies yolk granule proteins. The cortical granule antigen is secreted at egg activation and during early development. These immunologically similar yolk antigens are glycoproteins that exist in large quantities all along the nonfeeding stages of development.

Animal development, Antigens, Starfishes

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NAADP and InsP3 play distinct roles at fertilization in starfish oocytes

Article Abstract:

Study of usage of Calcium ionic waves as catalysts of starfish oocytes with sperm is presented.

Italy, Japan, All Other Miscellaneous Chemical Product and Preparation Manufacturing, Catalysts, Chemical preparations, not elsewhere classified, Analysis, Usage, Ionic solutions, Animal reproduction

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