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PCR amplification from aged LBC specimens using human GAPDH primers. Ethidium bromide-stained agarose gel. Lane 1, SurePath medium; lanes 2 to 4, >4-year-old residual SurePath specimens; lane 5, PreservCyt medium; lanes 6 to 8, >5-year-old residual PreservCyt specimens. Note that the amplification of more than one genomic product of approximately 452 bp is expected due to the presence of GAPDH pseudogene copies in the human genome.
