sidechain = Group('asp_sidechain_noh')
peptide = Group('peptide_ct_noh')
bonds = [Bond(peptide.C_alpha, sidechain.C_beta), ]
symbol = 'Asp'
amber_charge = {sidechain.O_delta_2: -0.8162, sidechain.C_beta: -0.0677, peptide.N: -0.5192, peptide.C_alpha: -0.1817, sidechain.O_delta_1: -0.8162, peptide.O: -0.7887, sidechain.C_gamma: 0.8851, peptide.C: 0.7256, peptide.O_2: -0.7887, }
name = 'aspartic_acid'
chain_links = [peptide.N, None]
