This definition appears rarely
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Microinjection of 7PA2 CM (1. 5 l intracerebroventricular, i. c. v. ) completely blocked LTP at 3 h post-stimulation; only a waning potentiation lasting <90 min was elicited (Fig. 3a, g). In contrast, a robust LTP that was stable for over 3 h was induced after identical infusion of CM (1. 5 l) from untransfected CHO- sister cultures (Fig. 3a, g). The LTP block was not related to any decrease in baseline transmission, because 7PA2 CM did not alter synaptic responses (EPSPs) in the absence of HFS (Fig.