heparan-alpha-glucosaminide N-acetyltransferase activity
heparan-alpha-glucosaminide n-acetyltransferase activity
Catalysis of the reaction: alpha-D-glucosaminyl-[heparan sulfate](n) + acetyl-CoA = N-acetyl-alpha-D-glucosaminyl-[heparan sulfate](n) + CoA + H+.