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Dose response of MS2 coliphage exposed to UV light from a tunable laser at 253.7 nm as measured by RT-qPCR using two fragments of 1,185 bases (■) and 2,169 bases (▲), after calibration by plaque assay infectivity (×) (28) (n = 1). Data represented by open symbols, which indicate that the assay detection limit was reached, were not used for data analysis.
