Microfilaments in the Polar Lobe Constriction of Fertilized Eggs of Ilyanassa Obsoleta
نویسندگان
چکیده
GARY W. CONRAD, DANIEL C . WILLIAMS, F. RUDOLF TURNER, KENNETH M. NEWROCK and RUDOLF A. RAFF. From the Division of Biology, Kansas State University, Manhattan, Kansas 66506, Mount Desert Island Biological Laboratory, Salisbury Cove, Maine 04672, and Department of Zoology, Indiana University, Bloomington, Indiana 47401 . Drs. Conrad and Williams are from Kansas State University and Mount Desert Island Biological Laboratory . Drs . Turner, Newrock, and Raff are from Indiana University.
منابع مشابه
Rotein Synthesis before and after Fertilizati in the Egg of Ilyanassa Obsolet’
Protein synthesis before and after fertilization in Zlyanassa obsoleta has been investigated. Unfertilized eggs do incorporate significant amounts of labelled amino acids into protein. However, fertilized eggs undergo an increase both in uptake and incorporation of labelled ammo acids into protein within 15 minutes of fertilization. Post-fertilization protein synthesis is sensitive to but not c...
متن کاملThe relation of the two blastomeres to the polar lobe in
Experiments on the influence of the polar lobe on the development of molluscs have shown that after removal of the polar lobe cleavage is radially symmetrical and indications of bilateral symmetry do not appear (Wilson, 1904: Dentalium; Clement, 1952: Ilyanassa). In normal development the polar lobe fuses with one of the two cells of the trefoil stage, and this cell becomes the posterior side o...
متن کاملA comparison of certain isozyme patterns in lobeless and normal embryos of the snail, Ilyanassa obsoleta.
A study was made of the emergence of certain enzymes during the embryogenesis of llyanassa. Lobeless and normal embryos were compared in order to determine the effect of polar lobe removal on subsequent molecular developments. Polyacrylamide gel electrophoresis in capillary tubes, a technique requiring only small numbers of embryos, was used to obtain the isozyme patterns of alkaline phosphatas...
متن کاملThe relation of the two blastomeres to the polar lobe in Dentalium.
Experiments on the influence of the polar lobe on the development of molluscs have shown that after removal of the polar lobe cleavage is radially symmetrical and indications of bilateral symmetry do not appear (Wilson, 1904: Dentalium; Clement, 1952: Ilyanassa). In normal development the polar lobe fuses with one of the two cells of the trefoil stage, and this cell becomes the posterior side o...
متن کاملThe effect of removing the polar lobe in centrifuged eggs of Dentalium.
Classical evidence for the existence of morphogenetic substances was provided by experiments with spiralian eggs possessing a polar lobe: Ilyanassa (Crampton, 1896; Clement, 1952, 1956, 1962); Dentalium (Wilson, 1904); Chaetopterus (Tyler, 1930); Sabellaria (Hatt, 1932; Novikoff, 1938); and Mytilus (Rattenbury & Berg, 1954). Eggs from which the polar lobe had been removed developed into embryos...
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ورودعنوان ژورنال:
- The Journal of Cell Biology
دوره 59 شماره
صفحات -
تاریخ انتشار 1973