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. 2007 Feb 7;104(7):2199–2204. doi: 10.1073/pnas.0611217104

Fig. 5.

Fig. 5.

A summary of phosphopeptide analysis by CID and ETD. Identical samples digested with three proteases were analyzed by CID and ETD. The number of phosphopeptide ions identified in each of the sample sets digested with trypsin, Glu-C, and Lys-C is shown.