Abstract
MANY animal tissues contain specific protein-like substances that combine with vitamin B12. The availability of the vitamin in this bound form when given by mouth to animals depends on the origin of the binding material. Homologous bound forms are fully available, whereas a similar preparation from a different species may not be1.
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HOLDSWORTH, E., COATES, M. Absorption of Vitamin B12 from the Rat Intestine. Nature 177, 701–702 (1956). https://doi.org/10.1038/177701a0
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DOI: https://doi.org/10.1038/177701a0
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