At moderate levels (0.5-1.0% ionic and non-ionic detergents) most of the glycosidases show satisfactory activity or are unaffected. Exceptions are: PNGase F (all formulations), O-glycosidase, and β-N-Acetylglucosaminidase, which are inhibited by SDS. It is imperative to add NP-40 to a final concentration of 1% to your reaction mixture in order to counteract detergent inhibition.

Endo D is also inhibited by SDS, however NP-40 does not counteract this inhibition.

Finally, common stabilizing reagents such as Tween, Triton X-100, NP-40, octyl glucoside and non-detergent sulfobetaines, as well as traces of organic solvents, can prevent optimal rapid deglycosylation by Rapid PNGase F.