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. 2022 Aug 1;41(4-5):444–456. doi: 10.1007/s10930-022-10065-6

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Fig. 2 — The key interaction networks in the delta and omicron variants that exhibited strong interactions. The ACE2 and RBD are shown in red and blue ribbons, respectively. The omicron variant has a strong interaction network (top inset panel) at the center of the long α-helix (residues 19–53), while the delta variant exhibits two stronger interaction zones (bottom inset panel), one in the central zone and the other in the right zone separated by the broken black line (Color figure online)