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Characterizing spikes. 8/11/2006. Jason Gilder. Spikes. Caused by voltage fluctuations and particles in the polymer Usually appear in three or more channels Usually appear at precisely the same data collection point. ABI literature. More ABI literature. Data set. 89 Samples
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Characterizing spikes 8/11/2006 Jason Gilder
Spikes • Caused by voltage fluctuations and particles in the polymer • Usually appear in three or more channels • Usually appear at precisely the same data collection point
Data set • 89 Samples • Reference Samples • Positive Controls • Negative Controls • 1010 “Good” peaks • All below 4000 RFUs • 55 peaks associated with 24 spike events
Spike measurement Ratio = peak area / peak height
Establishing boundaries • We can capture 95% of the population with two standard deviations • Determine limits for observed ratios • Lower limit for “Good” peaks: 5.5 • Upper limit for spikes: 4