the occurrence of alpha-mannosidase activity at the surface of hamster embryo ( nil ) fibroblasts is indicated by the following findings : ( a ) when nil cells were incubated on the glass surfaces on which ovalbumin glycopeptides were covalently linked , a rapid release of free mannose from ovalbumin glycopeptides was observed as evidenced by analysis on gas chromatography/mass spectrometry .
C0016030
fibroblasts
C0007634
cells