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Proposed CASD1 O-acetyltransferase activity. (A) CAS1 Domain-Containing Protein 1 (CASD1) sialyl-O-acetyltransferases (SOAT) activity on CMP-Neu5Ac. (B) Biosynthesis pathway for OAcGD3 ganglioside by direct acetylation of GD3. Cer: ceramide.
