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Active carbon dioxide

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Active carbon dioxide

Activated carbon dioxide, a complex of N-carboxybiotin (biotin _ CO2) and an enzyme; the form in which carbon dioxide is added to other molecules in carboxylations; e.g., to methylcrotonyl-CoA to form beta-methylglutaconyl in the catabolism of leucine, and to acetyl-coa to form malonyl-coa.

See: acetyl-coa carboxylase.