Abstract
Normal murine peritoneal macrophages were maintained in culture for 24 hours and 6 days. These cells continuously incorporated 3H-glucosamine and 3H-fucose in their membrane components. For both precursors culture ages, these components may be considered to undergo turnover according to a given rhythm with a 24 hours doubling time. Treatment with neuraminidase did not modify the doubling time, although a slight increase of incorporation of radioactivity was observed. Variations of 3H-fucose and 3H-glucosamine incorporations were observed between 24 hours old and 6 days old cultures: 6 days old cultures incorporated more glucosamine than 24 hours old cultures whereas no difference in fucose incorporation was observed between the two cultures.
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