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In situ hybridization of human trigeminal ganglia with DIG-labeled probes. (a) Sample 9 (normal) hybridized with VZV gene 29 probe. (b) Control, ganglion hybridized with non-VZV plasmid pGEM 3 DNA probe. (c and d) Sample 2 (HIV-positive) hybridized with VZV gene 63 probe and with VZV gene 29 probe respectively. Positive signals in neurons can be seen in a, c, and d, but not in b. (×450.)
