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Dependence of calcium absorption in chicken small intestine on content of calcium ii binding protein and effect of exogenous nucleotide precursors on this process



Dependence of calcium absorption in chicken small intestine on content of calcium ii binding protein and effect of exogenous nucleotide precursors on this process



Ukrainskii Biokhimicheskii Zhurnal 52(6): 746-752



The level of Ca absorption and the content of Ca-binding protein in the small intestine hypovitamized chickens in whom different exogenic precursors of nucleotides (potassium orotate or guanine) were administered at different stages of the response (0-72 h) with a single administration of vitamin D3 was studied. Under the effect of potassium orotate or guanine the degree of discrepancy between Ca absorption and the content of Ca2+-binding protein apparently increases at all stages under investigation. The results of the mathematical analysis which was based on the supposition of a linear dependence between the level of absorbed Ca and Ca2+-binding protein seen in the chickens who were administered nucleotide exogenic precursors, are presented. The amount of Ca-binding protein is evidently not a limiting factor in the mechanism of vitamin D3 stimulation of Ca absorption in the chicken small intestine.

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Dependence of calcium absorption in the chicken small intestine on its Ca2+-binding protein content and the effect of exogenous nucleotide precursors on this process. Ukrainskii Biokhimicheskii Zhurnal 52(6): 746-752, 1980

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