Fig. 4
From: The rapid detection of procalcitonin in septic serum using immunoaffinity MALDI chips
A Detailed MALDI FT-ICR spectrum of PCT from septic patient enriched by MALDI chip. Fragments of PCT and their oxidized forms corresponding to cleavage at the R84-C85 site were detected. B MALDI FT-ICR spectrum of human recombinant PCT spiked in serum and incubated at 37 °C shows no equivalent fragments. This indicates that the origin of the fragments is not related to sample degradation