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  • Title: Sialidase activity in nuclear membranes of rat brain.
    Author: Saito M, Fronda CL, Yu RK.
    Journal: J Neurochem; 1996 May; 66(5):2205-8. PubMed ID: 8780055.
    Abstract:
    A highly purified nuclear membrane preparation was obtained from adult rat brain and examined for sialidase activity using GM3, GD1a, GD1b, or N-acetylneuramin lactitol as the substrate. The nuclear membranes contained an appreciable level of sialidase activity; the specific activities toward GM3 and N-acetylneuramin lactitol were 20.5 and 23.8% of the activities in the total brain homogenate, respectively. The sialidase activity in nuclear membranes showed substrate specificity distinct from other membrane-bound sialidases localized in lysosomal membranes, synaptosomal plasma membranes, or myelin membranes. These results strongly suggest the existence of a sialidase activity associated with the nuclear membranes from rat brain.
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