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. Author manuscript; available in PMC: 2011 Apr 1.
Published in final edited form as: J Am Soc Mass Spectrom. 2010 Jan 4;21(4):580–591. doi: 10.1016/j.jasms.2009.12.011

Figure 3.

Figure 3

(a) Percent of c- and y-type ions and (b) percent of [a - Base] and w-type ions of model single-strand siRNAs in various charge states observed by IRMPD (light gray) and CID (dark gray). The data was compiled from IRMPD mass spectra in which the precursor ion was reduced to ~10% relative abundance (required 5 – 7 ms of irradiation). A value of 100% would indicate that all possible c/y-ions or [a - Base]/w-ions were detected.