Table 2.

Formulations for Ussing chamber flux and in vivo 59Fe absorption studies*

CompoundConcentration (mM)AAConcentration (mM)
NaCl 103 (86) Aspartic acid 
KCl 5.2 Glutamine 
NaH2PO4 7.6 Glycine 
Na2HPO4 1.4 Glutamic acid§ 6.3 
MgCl2 1.2   
CaCl2· 2H21.2   
Na citrate monobasic 25   
FeSO4 · 7 H21.5ǁ   
CompoundConcentration (mM)AAConcentration (mM)
NaCl 103 (86) Aspartic acid 
KCl 5.2 Glutamine 
NaH2PO4 7.6 Glycine 
Na2HPO4 1.4 Glutamic acid§ 6.3 
MgCl2 1.2   
CaCl2· 2H21.2   
Na citrate monobasic 25   
FeSO4 · 7 H21.5ǁ   
*

Adjusted to pH 6.5; osmolarity = 296 mOsm (control formulation), 294 mOsm (4 AA formulation).

No AAs were added to the control formulation.

103 mM (control formulation), 86 mM (4 AA formulation).

§

Monosodium, monohydrate.

ǁ

Omitted for in vivo iron absorption studies (unless stated otherwise).

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