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Cellular DNA Content and the Evolution of Teleostean Fishes
The haploid DNA content has been determined for 275 species of teleostean fishes. Chromosome numbers are known for 73 of these. DNA content ranges from 4.4 picograms down to a minimum of 0.4. TheExpand
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Evolution of Cellular DNA Content in Teleost Fishes
The haploid amount of DNA in teleost fishes ranges from 0.40 to 4.4 picograms. Almost all the teleost groups with low amounts of DNA per cell are considered to be evolutionally advanced. Most of theExpand
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Growth and development of the laboratory cultured sea urchin.
A method is described for raising sea urchins from egg to egg in the laboratory. The larvae are raised on flagellated marine algae and the young urchins on a substrate-dwelling diatom. The majorExpand
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Morphology and Genetics of Sea Urchin Development
synopsis. Sea urchins can be raised from egg to egg in the laboratory. With proper food, the larvae can be grown to maturity in about 3 weeks. When mature larvae are exposed to the proper chemicalExpand
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An improved fluorometric assay for DNA.
Abstract A modification of the fluorometric assay of Kissane and Robins is described. The modified procedure is very accurate, widely applicable, and reasonably easy to use. A standard cell typeExpand
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Initiation of metamorphosis in laboratory cultured sea urchins.
Many benthic marine animals release their gametes, embryos, or larvae into the water column. The offspring subsequently enter the adult population through settlement and metamorphosis. Sea urchinsExpand
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Immune response in the sea urchin Lytechinus pictus.
The sea urchin shows an immune response to grafted tissue similar to that found in vertebrates. Unrelated animals rejected allografts in about 30 days. Acceptance of allografts was observed forExpand
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THE DNA SYNTHETIC PERIOD DURING EARLY DEVELOPMENT OF THE SEA URCHIN EGG.
Abstract The DNA synthetic period lasts about 13 min (at 15 °C). It begins a few minutes after the start of telophase and ends shortly after the beginning of interphase. At the time synthesis beginsExpand
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THE ISOLATION OF NUCLEI FROM EGGS AND EMBRYOS OF THE SEA URCHIN
  • R. Hinegardner
  • Biology, Medicine
  • The Journal of cell biology
  • 1 December 1962
Nuclei can be isolated from the eggs and embryos of the sea urchin by a four step method: (1) washing with dextrose solution until the cells become weak, (2) cytolysis in 0.002 M Mg++ solution, (3)Expand
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Rationale for a Universal Genetic Code
A mutation in the genetic code would place new amino acids in certain loci and entirely eliminate amino acids from other loci of practically all proteins in an organism. It is reasonable to postulateExpand
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