after treatment with neuraminidase 2.92 nmol/mg dry weight and 3.73 nmol/mg dry weight of sialic acid were freed from u 251 cells and c6 cell , but only 8.11 % ( u 251 cell ) and 11.24 % ( c 6 cell ) of these sialic acids originated from glycolipid , and thus the major part of sialic acid might be released from glycoprotein of the cells .
C0037025
sialic acids
C0067762
sialic acid