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solute carrier family 23 protein
This family includes permeases for diverse substrates such as xanthine Swiss:P42086, uracil Swiss:P39766 and vitamin C Swiss:Q9UGH3. However many members of this family are functionally uncharacterised and may transport other substrates. Members of this family have ten predicted transmembrane helices. (from Pfam)
uracil-xanthine permease family protein
uracil-xanthine permease family protein similar to xanthine permease and uracil permease, which mediate the transport of xanthine and uracil, respectively
NCS2 family nucleobase:cation symporter
The Nucleobase:Cation Symporter-2 (NCS2) Family (TC 2.A.40) Most of the functionally characterized members of the NCS2 family are transporters specific for nucleobases including both purines and pyrimidines. However, two closely related rat members of the family, SVCT1 and SVCT2, localized to different tissues of the body, cotransport L-ascorbate and Na+ with a high degree of specificity and high affinity for the vitamin. The NCS2 family appears to be distantly related to the NCS1 family (TC #2.A.39).
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