Source:http://linkedlifedata.com/resource/umls/id/C1324679
GO: Catalysis of the reaction: acetyl-CoA + an alpha-2,8-linked polymer of sialic acid = CoA + polysialic acid acetylated at O-7 or O-9. [EC:2.3.1.136, MetaCyc:POLYSIALIC-ACID-O-ACETYLTRANSFERASE-RXN]