Fig. 3
From: The rapid detection of procalcitonin in septic serum using immunoaffinity MALDI chips
Detection of PCT using the MALDI chips in three selected septic patients (from top to bottom). The figure shows detailed spectra of singly and doubly charged ions of PCT and its cleaved forms measured by MALDI-TOF MS (left and center) and by MALDI FT-ICR (right). In the third patient's sample, the intensity of the doubly and singly charged ions of PCT is very low compared to the intensity of singly charged fragment ion at m/z 6 303.850, which indicates that most of the PCT was converted into the fragment form