ABSTRAa. The transfer and metabolism of L-carnitine, L-acetylcarnitine, and L-palmitoylcarnitine were studied in the human placenta at term by means of in vitro dual perfusion of a placental lobe. L-Carnitine transfer was 20% that of the freely diffusing antipyrine and 40% that of Llysine. The transfer of L-acetylcarnitine was similar to that of ccarnitine, but no placental transfer of L-palmitoylcarnitine was found. In contrast to L-lvsine. L-carnitine. and -,

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