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Comparison of SADΔG-EGFP and lentivirus. These confocal images of intrinsic fluorescence, taken back to back using identical instrument settings, show cortical pyramidal cells retrogradely infected either with a lentivirus pseudotyped with the rabies virus glycoprotein and expressing EGFP driven by the cytomegalovirus promoter, or with the recombinant rabies virus SADΔG-EGFP. (a–c) Lentivirus. (d) The rabies virus SADΔG-EGFP. Scale bars, 150 µm.
