Fig. 2
From: Criteria for identifying the molecular basis of the engram (CaMKII, PKMzeta)

Occlusion test. AAV virus was used to overexpress PKM-zeta in vivo. a Overexpression of WT (wild type) kinase, but not the kinase dead (KD), form enhanced synaptic transmission. b Overexpression of WT kinase enhanced late LTP; i.e., occlusion did not occur. c Overexpression of WT enhanced contextual fear, measured 1 week after learning; i.e., occlusion did not occur. Data from [28]