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. 2021 Jan 9;39(7):1087–1095. doi: 10.1016/j.vaccine.2021.01.011

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Fig. 1 — (A) Jalview representation of multiple sequence alignment of all the 8 different strains sequences of spike surface glycoprotein of COVID-19. (B) The protein variability index of spike surface glycoprotein was determined by using PVS server. The threshold of conservancy was kept at 1.0 for our analysis. X axis indicates the position of amino acid sequence and Y axis indicates the Shannon entropy.