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Tissue localization of riboflavin transporters in humans.
| Transporter | Localization | Mechanism |
|---|---|---|
| SLC52A1 | Placenta, small intestine | Na+, Cl–, pH-independent |
| SLC52A2 | Ubiquitous, higher in brain and salivary gland | Na+, Cl–, pH-independent |
| SLC52A3 | Testis, small intestine | Na+, Cl– independent, pH sensitive with about ½ half of the activity at neutral pH and 1/3 at pH 8.5 when compared to pH 5.5 |
