Acetoacetate and 3-hydroxybutanoate are thought to be exported into the extracellular space via transporters belonging to the monocarboxylate transporter (MCT) family. So far only, chk has been shown to be involved in acetoacetate export by cortex glia cells. The mitochondrial transporters are not known. Acat2 is a paralog of Acat1. As it is predicted to localize in the cytosol and there is no information for its involvement in ketone body metabolism, Acat2 is not included in the list.
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