Yeah, there's a huge difference between a 1Å all-atom RMSD structure, and a 1Å backbone RMSD structure. The non-backbone atoms in a protein make up most of the

Yeah, there's a huge difference between a 1Å all-atom RMSD structure, and a 1Å backbone RMSD structure. The non-backbone atoms in a protein make up most of the mass and volume. When structural biologists talk about RMSD, this is what they mean.