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Prevalence and Characterization of Murine Leukemia Virus Contamination in Human Cell Lines

Fig 9

Detection of RT activity in cell lines infected with MLV of contaminated cell lines by PERT assay.

Cell culture supernatants of the infected cell lines NCI-H82 and VERO-B4 were harvested after 45 and 44 days after infection, respectively. MS2 phage RNA was reverse transcribed with an MS2-specific primer and the MLV derived RT of the samples in the presence of MnCl2. The cDNA was then amplified with a second MS2-specific primer applying PCR. The signals of the cell lines infected with LCL-HO supernatant may potentially be ascribed to the activity of SMRV derived RT. dpi: days post infection.

Fig 9

doi: https://doi.org/10.1371/journal.pone.0125622.g009