were analyzed by whole protein mass spectrometry. Samples were prepared
and analyzed as described previously.25 (link) The data were obtained with a QSTAR XL (AB Sciex) quadrupole time-of-flight
mass spectrometer with the IonSpray electrospray source, and Analyst
QS version 1.0 (AB Sciex) and BioAnalyst extensions version 1.1 (AB
Sciex) were used for the acquisition and analysis of the data.