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Characterization of telomerase activity using QTRAP with HeLa cell extract. A, QTRAP standard curve using total protein titration of HeLa cell extract (n = 3). B and C, readout of QTRAP measurements with HeLa, VA-13, or RNase-treated HeLa cell extract (n = 6) and with sequentially diluted HeLa cell extract (n = 3).
