β-elemene enhances the radiosensitivity of gastric cancer cells by inhibiting Pak1 activation

Figure 4 MS/MS spectrum showing the peptides from PAK1IP1 (peptide sequence: QNAHIVEWSPR) (A) and relative quantification of PAK1IP1 expression in the indicated conditions (B). Different protein samples from SGC7901 cells labeled with iTRAQ reagents as follows: control-114 tag, β-elemene treated-115 tag, IR-116 tag, β-elemene combined with IR-117 tag. The relative intensity indicates the relative abundance of PAK1IP1 expression in different conditions.