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Preamplification of SIV and cellular IL-2 DNAs. SIV gag and genomic IL-2 (gIL-2) DNAs were preamplified by PCR for 5, 10, 15, 20, and 25 cycles. Quantitative PCR analysis was then performed on these samples. Each point represents the average CT value for three replicates. The greatest standard deviation of any point was 0.28. Error bars are too small to be visible.
