Figure 2
![Figure 2](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2F1472-6807-7-26/MediaObjects/12900_2006_Article_107_Fig2_HTML.jpg)
Reverse-phase high-performance liquid chromatography (RP-HPLC) chromatogram of completely trypsinolyzed HbII complex. ESI-MS peaks subjected to ESI-MS zoom scan and tandem MS analyses and their corresponding RP-HPLC fractions were indicated on this Figure. Charge-states of peaks (inferred based on the ESI-MS zoom scan data) were indicated as superscripts (see also Figure 3b inset).