sidechain = Group('pro_sidechain_uni')
peptide = Group('peptide_proline_nt_uni')
bonds = [Bond(peptide.C_alpha, sidechain.C_beta), Bond(peptide.N, sidechain.C_delta), ]
symbol = 'Pro'
amber91_charge = {peptide.C_alpha: 0.212, peptide.O: -0.451, sidechain.C_delta: 0.191, peptide.N: -0.161, peptide.H_2: 0.312, peptide.H_3: 0.312, peptide.C: 0.596, sidechain.C_beta: 0.0, sidechain.C_gamma: -0.011, }
name = 'proline'
chain_links = [None, peptide.C]
