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[7] Each subunit interacts with each other through alpha helix and beta sheet hydrogen bonding interactions and contains two domains

Vitamin B12 deficiency has occurred in breast-fed infants of vegetarian mothers whose diets contain no animal products (e.g., eggs, dairy), even though the mothers had no symptoms of deficiency at the time

Gut microbiota-derived tryptophan metabolites maintain gut and systemic homeostasis

Iron homeostasis is regulated by two main mechanisms: an intracellular mechanism, which depends on the amount of iron available to the cell, and a systemic mechanism, in which hepcidin plays a crucial role [10]