sidechain = Group('leu_sidechain_uni')
peptide = Group('peptide_uni')
bonds = [Bond(peptide.C_alpha, sidechain.C_beta), ]
symbol = 'Leu'
name = 'leucine'
chain_links = [peptide.N, peptide.C]
amber91_charge = {peptide.O: -0.5, sidechain.C_beta: 0.016, sidechain.C_delta_1: -0.014, sidechain.C_delta_2: -0.014, peptide.C_alpha: 0.204, sidechain.C_gamma: 0.054, peptide.H: 0.248, peptide.C: 0.526, peptide.N: -0.52, }
