Protein Structure from Scientific Research

Red domains in RBD (130-loop, 150-loop, 190-helix, and 220-loop) from b were enlarged and displayed with a sialic acid molecule (light green) in the groove. HA sequence of A/Astrakhan/3212/2020 was modeled by SWISS-MODEL and drawn by PyMOL software obtained from https://pymol.org/2/ . The PDB number for the -2,6-sialic acid molecule is 5E35.

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