Fig 1: Primary endometrial epithelial cells and KLE cell line (ATCC CRL-1622) were infected with HHV-6A or UV-inactivated (Mock-infected) HHV-6A. The infection was evaluated after 1, 3, 7, and 14 days post infection (d.p.i.). (A) DNA and (B) RNA expression of viral U94 antigen were evaluated by Real time PCR. Results represent the mean copy number ± SD referred to duplicates of 4 independent assays. (C,D) Endometrial epithelial cells were stained for gp116 late viral antigen 7 d.p.i. with HHV-6A (C) or mock (D). Images were taken in bright field (upper panels) or fluorescence (lower panels) (Nikon Eclipse TE2000S) equipped with a digital camera. Original magnification 20×.