sidechain = Group('pro_sidechain_noh')
peptide = Group('peptide_proline_ct_noh')
bonds = [Bond(peptide.C_alpha, sidechain.C_beta), Bond(peptide.N, sidechain.C_delta), ]
symbol = 'Pro'
amber_charge = {peptide.O_2: -0.7697, peptide.C: 0.6631, sidechain.C_delta: 0.0434, sidechain.C_gamma: 0.0466, peptide.O: -0.7697, sidechain.C_beta: -0.0543, peptide.N: -0.2802, peptide.C_alpha: -0.1336, }
name = 'proline'
chain_links = [peptide.N, None]
