## Abstract After fertilization the sea urchin sperm nucleus transforms into the male pronucleus which later fuses with the female pronucleus reβestablishing the diploid genome of the embryo. This process requires remodeling of the sperm chromatin structure including the replacement of the sperm hi
Mitochondrial and cytoplasmic protease activity in sea urchin eggs
β Scribed by Maggio, R.
- Publisher
- Wiley (John Wiley & Sons)
- Year
- 1957
- Tongue
- English
- Weight
- 412 KB
- Volume
- 50
- Category
- Article
- ISSN
- 0095-9898
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Elongation of microvilli and formation of actin filaments after treatment with a phorbol ester, TPA, were investigated in unfertilized eggs of Hemicentrotus pulcherrimus. Microvilli on the egg surface were examined by scanning electron microscopy. Actin filaments in the cortical layer of the eggs we
## Abstract In sea urchin eggs, the activity of ornithine decarboxylase (ODC) [ E C 4.1.1.17] is detectable only in the particulate fraction yielded by centrifuging egg homogenates at 10,000g for 30 minutes. ODC activity in the particulate fraction isolated from fertilized eggs is higher than that
## Abstract Certain experimental manipulations with sea urchin oocytes, eggs, and early embryos result in induction of cell death. We were interested in whether or not these cells posessed functional apoptotic machinery, and whether cellular demise under certain experimental conditions is due to ac