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. 2021 May 13;495:113071. doi: 10.1016/j.jim.2021.113071

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Fig. 1 — Protein of SARS-CoV-2 potential antigenic peptides tested by the Pepscan technique. (A) Peptides (spots) distribution of three structural and non-structural proteins of SARS-CoV-2. (B) Domain structure of the SARS-CoV-2 S, N and M proteins. (C) Peptide reactivity against pools of sera. The increasing reactivity of the peptides in the Pepscan spots, rises from gray to black and when it is very intense it turns red. In each block the upper pair shows the results for sera pool 1(P1) and the lower for pool 2 (P2). Reactivity (absent) to peptides included in Membrane 3 is not shown.