Fig. 1.
PC molecular species analysis of the mouse lung and exogenous surfactants. Compositions of mouse surfactant (A), poractant alfa (B), and CHD5633 (C) detailed by precursor scanning of the phosphocholine ion fragment at m/z 184. Precursor scanning of the [513C]phosphocholine head group confirmed that [U13C]DPPC was >99% isotopically labeled (D).