The choline transporter-like protein 1 (SLC44A1) as an important mediator of choline transport across both the plasma membrane and the mitochondrial membrane. It is an essential step in the oxidation of Cho to betaine, which occurs in the mitochondrial matrix (Michel & Bakovic 2009).
Michel, V, Bakovic, M
choline transmembrane transporter activity of SLC44A1 [mitochondrial outer membrane]
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