Figure 1From: ROTAS: a rotamer-dependent, atomic statistical potential for assessment and prediction of protein structuresDescription of the interaction between atom types i and j . Total eight parameters are used to specify the interaction between two atoms. Here, d ij , θ i , ϕ i are the spherical coordinates of atom j with respect to the local frame of atom i, and ω is a torsional angle around d ij , and R i and R j represent the rotameric state of residues. The rotameric states are determined by side-chain dihedral angles.Back to article page