Fig. 4.

A Peptide identification and analysis of SARS-CoV-2 samples and its B.1.1.7 variant via LC-Q-TOF-MS/MS (n = 6). Bold peptides are sequences found in both SARS-CoV-2 and B.1.1.7 variants (n = 3 each). B Ensemble of the sequences that could be detected through LC-Q-TOF-MS/MS and their positioning over the SARS-CoV-2 genome. Non-structural proteins are represented mainly by replicase 1a (from ORF1a) and replicase 1ab (from ORF1a and b). Red and green colors represent the absence or presence of the peptide sequence in the tested samples