Fig. 2
From: Development of a rapid and specific MALDI-TOF mass spectrometric assay for SARS-CoV-2 detection
MALDI-TOF-Mass Spectra of SARS-CoV-2-Positive Patient Samples. (A) Tryptic peptides from SARS-CoV-2 nucleoprotein GQGVPINTNSSPDDQIGYYR (peptide A), GQGVPINTNSSPDDQIGYYRR (peptide Aext) and AYNVTQAFGR (peptide C) as well as the isotope-labeled peptides SIL-A and SIL-C (Table 1) are highlighted. (B) Diagnostic peptides from SARS-CoV-2 nucleoprotein (peptides C and SIL-C) are shown enlarged