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  • 1
    ISSN: 0021-9541
    Keywords: Life and Medical Sciences ; Cell & Developmental Biology
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Biology , Medicine
    Notes: α2-Macroglobulin (α2M), epidermal growth factor (EGF), and vesicular stomatitis virus (VSV) each enter cultured fibroblasts by receptor-mediated endocytosis. The present study defines some basic ionic requirements in the cell culture medium which are necessary for the maximal rate of endocytosis of these three ligands. Na+ and HCO3- were both necessary for maximal endocytosis of 125I-α2M, 125I-EGF, and 35S-VSV at 37°C. The ion specificities for both the anion and cation requirements were established. The binding of 125I-α2M to its cellular receptors at 4°C was unaffected by the absence of Na+ and HCO3- in the culture medium. In addition, the absence of Na+ and HCO3- in the culture medium did not reduce cellular uptake of horseradish peroxidase by fluid phase endocytosis. Na+ and HCO3- may be general requirements in receptor-mediated endocytosis.
    Additional Material: 3 Ill.
    Type of Medium: Electronic Resource
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  • 2
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    American Association for the Advancement of Science (AAAS)
    Publication Date: 1984-08-10
    Description: 〈br /〉〈span class="detail_caption"〉Notes: 〈/span〉Dickson, D -- New York, N.Y. -- Science. 1984 Aug 10;225(4662):606.〈br /〉〈span class="detail_caption"〉Record origin:〈/span〉 〈a href="http://www.ncbi.nlm.nih.gov/pubmed/6740327" target="_blank"〉PubMed〈/a〉
    Keywords: *Embryo Research ; Embryo Transfer ; Embryo, Mammalian ; Female ; Fertilization in Vitro ; *Government Regulation ; Great Britain ; Humans ; *Legislation, Medical ; Oocyte Donation ; Pregnancy ; special license be required for all embryo experimentation and that any ; unlicensed research be considered a criminal offense. Regulation would be by a ; new statutory body responsible for monitoring in vitro fertilization research and ; various types of fertility treatments. Surrogate motherhood would be prohibited. ; Reservations expressed by professional groups as well as by some committee ; members about the restrictions reflect legal and social problems surrounding the ; uses of human embryos.
    Print ISSN: 0036-8075
    Electronic ISSN: 1095-9203
    Topics: Biology , Chemistry and Pharmacology , Computer Science , Medicine , Natural Sciences in General , Physics
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