Results 171 to 180 of about 20,652 (215)
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Sea urchin DNA methyltransferases
Cell Biophysics, 1989DNA methyltransferase activities have been partially purified from unfertilized eggs and blastula nuclei of sea urchin embryos. Comparative studies, using different DNAs as substrates, show that the two preparations are most active on hemimethylated and single-strand DNA, but they methylate, though at a lower rate, also on double-strand DNA.
Tosi L +5 more
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Hyaluronidase in Sea-Urchin Sperm
Nature, 1947A SUBSTANCE liquefying the jelly-coat of sea-urchin eggs was first recovered from the sperm of sea-urchins by Hartmann and Schartau1, who called it 'Androgamone II'. The enzyme nature of this substance was, however, denied2; moreover, it was pointed out that hyaluronidase from bull testis does not dissolve the jelly-coat of sea-urchin eggs3.
A, MONROY, A, RUFFO
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The chromatin of sea urchin sperm
Biochimica et Biophysica Acta (BBA) - Gene Structure and Expression, 1987Digestion of sea urchin sperm nuclei with micrococcal nuclease yields nucleosomal monomer fragments of 151 and 164 base pairs. Prior trypsin treatment of the sperm chromatin does not alter the size of these monomer DNA fragments despite the fact that the H1 histone is reduced to a limit globular peptide of about 83 residues. Heterologous reconstitution
P, Puigdomenech +5 more
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Activation of Sea Urchin Gametes
Annual Review of Cell Biology, 1986CONTENTS INTRODUCTION .••••••••........ 1 SPERMATOZOA . .. . . . . . . . . . . . . . . . . . . . . . . . . . .. . . . . . . . . . ...... . . . . . . . . . . . .. . . . . . . . .. . . . . . . . . . . . . . . . . . . . . . . . . . ... . . . . . . . . . . . . . . . 3 Activation of Motility and Respiration... . . . . . . . . . . . . . . . . . . . . .
J S, Trimmer, V D, Vacquier
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The nomenclature of the spinochromes of sea urchins
Experientia, 1951La presente note contient une proposition de nomenclature des pigments naphtoquinoniques des parties calcaires d'Oursins. Les differents spinochromes sont designes par des lettres majuscules,A, B, C, etc. Le tableau donne cette nomenclature.
T W, GOODWIN, E, LEDERER, L, MUSAJO
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2019
Cilia are exceptionally complicated subcellular structures involved in swimming and developmental signaling, including induction of left-right asymmetry in larval stages. We summarize the history of research on sea urchin embryonic cilia. The high salt method to isolate cilia is presented first; methods to block cilia formation and to lengthen cilia ...
Robert L, Morris, Victor D, Vacquier
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Cilia are exceptionally complicated subcellular structures involved in swimming and developmental signaling, including induction of left-right asymmetry in larval stages. We summarize the history of research on sea urchin embryonic cilia. The high salt method to isolate cilia is presented first; methods to block cilia formation and to lengthen cilia ...
Robert L, Morris, Victor D, Vacquier
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An analysis of sea urchin metamorphosis
Zygote, 1999Metamorphosis of sea urchin larvae is initiated by one or more cues from the environment. The cues can be from bacterial films (Cameron & Hinegardner, 1974), algae (Kitamura et al., 1993) or sand and seawater from adult habitats (Highsmith, 1982).
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On “cytofertilizin” from sea urchins
Experimental Cell Research, 1956Abstract Cytofertilizin, a sperm agglutinating factor, was prepared from jelly-free sea urchin eggs. Cytofertilizin acts improving upon membrane formation and cleavage. The fertilization rate is improved by cytofertilizin. The release of cytofertilizin is favored by the presence of calcium.
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Sea urchin granuloma: a chronic complication of sea urchin spine injuries
QJM: An International Journal of Medicine, 2023Yuki Muroyama +3 more
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