ANM	Anisotropic network analysis
API	Application programming interface
PDB	Protein data bank
CE	Combinatorial extension
Cryo-EM	Cryo-electron microscopy
GNM	Gaussian network analysis
I	Intermediate state for RBD
NMA	Normal mode analysis
NM	Normal mode
NMWiz	Normal mode wizard
PCA	Principal component analysis
PC	Principal component
ps	Picoseconds
PDB	Protein data bank
RBD	Receptor-binding domain
RMSD	Root-mean-square deviation
RTB	Rotating and translating blocks
SPA	Single particle analysis
VMD	Visual molecular dynamics