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. 2023 May 8;41(26):3872–3884. doi: 10.1016/j.vaccine.2023.04.044

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Fig. 2 — Amino acid sequences of (A) the S1 and (B) S2 regions of spike protein for variant strains of interest showing conservation of IDMS peptides. Target peptides chosen for the quantification method are indicated in bold green font. In the Gamma variant, the ASANLAATK peptide has a T1027I mutation, leaving 4 peptides for quantification of spike protein.

Fig. 2 — Amino acid sequences of (A) the S1 and (B) S2 regions of spike protein for variant strains of interest showing conservation of IDMS peptides. Target peptides chosen for the quantification method are indicated in bold green font. In the Gamma variant, the ASANLAATK peptide has a T1027I mutation, leaving 4 peptides for quantification of spike protein.