FIGURE 8.

Nanoflow positive ESI-MS of ∼1.5 μm PKG (A), ∼1.5 μm PKG in the presence of 5 μm DT-2 (B), ∼1.5 μm PKG in the presence of 20 μm cGMP (C), ∼1.5 μm PKG and in the presence of 5 μm DT-2 and 20 μm cGMP (D). On the left, the raw m/z spectra are shown, and each multiply charge ion is labeled with a single letter, followed by the charge state and the centroid m/z value. On the right, the corresponding deconvoluted mass spectra are shown. Each peak is labeled with a single-letter code as in the raw spectra, followed by the calculated mass and determined complex composition.