Competition of Mn2+ and Zn2+ with59Fe2+ and59Fe3+ for the plasma membrane receptors from lactating mouse mammary gland |
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Authors: | Dimiter A. Moutafchiev Ljuben M. Sirakov |
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Affiliation: | (1) Department of Biochemistry, Research Medico-Biological Institute, Medical Academy, 2 Zdrave Str., 1431 Sofia, Bulgaria |
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Abstract: | Nonlabeled MnCl2 and ZnSO4 compete with59Fe2+-ascorbate and59Fe 2 3+ O3 for transport binding sites situated on the plasma membranes of lactating mouse mammary gland cells. The binding was found to be a process reaching saturation. The heterologous competition used here ruled out the participation of transferrin and to propose that Fe, Mn, and Zn are transported from blood to milk by a mechanism involving one receptor during lactation. Further experiments are necessary to establish the details of the transport mechanism. |
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Keywords: | Receptor site heterologous competition mammary gland |
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