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Older people and people with digestive tract conditions are most at-risk for developing vitamin B12 deficiencies
Engineering a peptide capable of activating all three receptors simultaneously required extensive optimization to achieve sufficient affinity without disproportionately favoring one receptor over another
doi:10.1111/j.1365-2273.2004.00814.x
Fan C, Chen J, Wang Y, Wong YS, Zhang Y, Zheng W, et al
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