Summary plots of intensity profiles of HA and PSD-95 at side-view synapses stained for HA (STED), PSD-95 (STED), and synapsin (confocal). Dashed lines denote levels in CaV2 cTKO (black) and CaV2 cTKO + CaV2.1 (orange); CaV2 cTKO, 200/3; CaV2 cTKO + CaV2.1, 180/3; CaV2 cTKO + CaV2.1ΔEF1, 203/3.