Before revision:  Based on analysis of extensive molecular dynamics (MD) simulation trajectories of eleven proteins with different sizes and folds, we found that significant spatially long-range backbone torsional pair correlations exist extensively in some proteins and are dominantly executed by loop residues .
After revision:  Based on analysis of extensive molecular dynamics (MD) simulation trajectories of eleven proteins with different sizes and folds, we found that significant spatially long-range backbone torsional pair (BTP) correlations, which are spatially more long-ranged and are mainly executed by loop residues .