sidechain = Group('cys_sidechain_noh')
peptide = Group('peptide_noh')
bonds = [Bond(peptide.C_alpha, sidechain.C_beta), ]
symbol = 'Cys'
amber_charge = {peptide.C_alpha: 0.0213, peptide.C: 0.5973, peptide.O: -0.5679, sidechain.S_gamma: -0.3119, peptide.N: -0.4157, sidechain.C_beta: -0.1231, }
name = 'cysteine'
chain_links = [peptide.N, peptide.C]
