Fig. 2From: Targeted quantitation of CFTR protein expression in vivo using immunoprecipitation & parallel reaction monitoring tandem mass spectrometryHuman CFTR peptide LSLVPDSEQGEAILPR after IP-MS analysis. A, recombinant hCFTR protein (50 ng) spike-in mouse lung membrane protein extracts (50 mg lung tissue); B, mouse lung membrane protein extracts only as a negative control (y-axis showed with zoomed-in scale)Back to article page