Nonactivatable

Fig. 15.8 Comparison of imaging with MPO(Gd) and a nonactivatable analog.

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Tonic block of sodium channels by many local anesthetics, a partial block that is presence in the absence of hig-frequency activation, appears to be caused by a selective action of the drug on a nonactivatable form of closed channels (COURTNEY 1975) .

Source: wiktionary

In native Torpedo membranes, the nAChR exists in equilibrium between activatable resting and nonactivatable desensitized states, with the equilibrium strongly favoring the desensitized conformation (roughly 80:20 resting:desensitized) (Boyd & Cohen, 1980; Heidmann & Changeux, 1979).

Source: wiktionary