sidechain = Group('cys_sidechain_noh')
peptide = Group('peptide_nt_noh')
bonds = [Bond(peptide.C_alpha, sidechain.C_beta), ]
symbol = 'Cys'
amber_charge = {peptide.N: 0.1325, sidechain.S_gamma: -0.3298, sidechain.C_beta: -0.1195, peptide.O: -0.5713, peptide.C: 0.6123, peptide.C_alpha: 0.0927, }
name = 'cysteine'
chain_links = [None, peptide.C]
