therefore , membrane-bound sialic acid ( released by vibrio cholerae neuraminidase treatment ) , ectosialyltransferase activity , and total cellular glycosidase levels were measured in this cell line and compared with levels in its parent melanoma tumor cell line , b16-f10 , which was selected for its enhanced ability to form tumor nodules .
C0027803
neuraminidase
C0017976
glycosidase