Abstract
The distribution of zinc (Zn) concentration in the blood and erythrocytes of common carp, grass carp, silver carp and tilapia was studied. It was found that in whole blood, the average Zn concentrations in these four species of fish (approx. 6–14 μg/[ml whole blood]) were relatively similar to those in other species of fish and mammals. However, the mean Zn concentration in the erythrocytes of common carp is approximately two times higher than the other three species of fish (approx. 5 vs approx. 2 μg/[ml whole blood]). It was found that approximately 70% of the Zn in the common carp whole blood came from its erythrocytes. In addition, approximately 43% of the Zn in the erythrocytes of common carp was found to be located on its outer plasma membranes. When an antibody against a 43 kDa Zn-binding protein, isolated from the digestive tract tissue of common carp, was used, significant quantities of the protein were shown to be present on the erythrocyte plasma membranes of common carp by an indirect immunofluorescent staining. High Zn on the outer plasma membrane of the common carp erythrocyte most probably comes from the 43 kDa Zn-binding protein.
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Jeng, SS., Yau, JY., Chen, YH. et al. High zinc in the erythrocyte plasma membranes of common carp Cyprinus carpio . Fish Sci 73, 421–428 (2007). https://doi.org/10.1111/j.1444-2906.2007.01350.x
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DOI: https://doi.org/10.1111/j.1444-2906.2007.01350.x