sidechain = Group('cyx_sidechain_uni')
peptide = Group('peptide_nt_uni')
bonds = [Bond(peptide.C_alpha, sidechain.C_beta), ]
symbol = 'Cyx'
amber91_charge = {peptide.H_2: 0.312, peptide.H_1: 0.312, sidechain.C_beta: 0.143, peptide.C: 0.526, peptide.N: -0.263, sidechain.LP_2: -0.4045, sidechain.LP_1: -0.4045, peptide.C_alpha: 0.143, sidechain.S_gamma: 0.824, peptide.O: -0.5, peptide.H_3: 0.312, }
name = 'cystine (s-s_bridge)'
chain_links = [None, peptide.C]
