Lack of active transfer of 14C tetraethylammonium and para-aminohippuric acid by the term sheep placenta.
D000618:Aminohippuric Acids / Q000097:blood / Q000378:metabolism*; D000818:Animals; D001693:Biological Transport, Active; D002247:Carbon Isotopes; D005260:Female; D008431:Maternal-Fetal Exchange; D010920:Placenta / Q000378:metabolism*; D011247:Pregnancy; D012756:Sheep; D013757:Tetraethylammonium Compounds / Q000097:blood / Q000378:metabolism*
D000618:Aminohippuric Acids; D002247:Carbon Isotopes; D013757:Tetraethylammonium Compounds