of 16 fractions were collected, desalted and dried. The hSAX fractions were redissolved in 5% formic acid for label-free LC-MS analysis. In addition to individual samples, a composite reference sample (‘HPSI_composite_1503’) was constructed by pooling together protein lysates from 43 iPSC lines. 2 mg of protein was used for each. All samples in this reference were of fibroblast origin and reprogrammed with sendai virus.
