Fig. 2: 3D/4D feature detection of precursors and fragments.
From: MaxDIA enables library-based and library-free data-independent acquisition proteomics
a, Visualization of precursors and fragments of a peptide measured on an Orbitrap. The raw data can be visualized together with the peak detection results as heat maps and 3D models for precursor and fragment data in the graphical user interface of MaxQuant. b, Two peptides with nearly equal mass, both with charge 2 and having very similar retention times, are resolved by ion mobility on a timsTOF Pro mass spectrometer. A heat map visualizes intensities as a function of retention time and collision cross-section for the precursor isotope patterns. The two respective MS/MS spectra of fragments assigned to the precursors are shown. RT, retention time.
