– Catalyzes the synthesis of acetyl-CoA from short-chain fatty acids. Acetate is the preferred substrate. Can also utilize propionate with a much lower affinity. Provides acetyl-CoA that is utilized mainly for oxidation under ketogenic conditions. Involved in thermogenesis under ketogenic conditions, using acetate as a vital fuel when carbohydrate availability is insufficient. ACSS1 Protein, Human, Recombinant (His) is expressed in yeast with N-10xHis tag. The predicted molecular weight is 73.6 kDa and the accession number is Q9NUB1.