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. 2020 May 31;16(5):375–386. doi: 10.6026/97320630016375

Table 1. Physicochemical properties calculated for chain A of SARS-CoV-2 spike protein.

Property Computed value
Number of residues 1281
Molecular weight 141410.94 kDa
Isoelectric point (PI) 6.09
Negatively charged residues 111
Positively charged residues 99
Instability index 31.26