Research Article

Comparison of Heavy Labeled (SIL) Peptide versus SILAC Protein Internal Standards for LC-MS/MS Quantification of Hepatic Drug Transporters

Figure 1

Comparison of SILAC versus SIL internal standard methods. SILAC protein is added before trypsin digestion, while SIL peptide is added just before LC-MS analysis. Key: DTT, dithiothreitol; IAA, iodoacetamide; EB-II, extraction buffer II.
451510.fig.001a
(a) SILAC method
451510.fig.001b
(b) SIL method