C = Atom('C')
C_alpha = Atom('CH2')
H = Atom('H')
N = Atom('N')
O = Atom('O')
bonds = [Bond(N, H), Bond(N, C_alpha), Bond(C_alpha, C), Bond(C, O), ]
pdbmap = [('', {'N': N, 'O': O, 'CA': C_alpha, 'H': H, 'C': C, }, ), ]
pdb_alternative = {'HA2': 'HA', 'HN': 'H', }
name = 'peptide'
opls_atom_type = {N: 'N', H: 'H', C_alpha: 'CQ', C: 'C', O: 'O',  }
opls_charge = {N: -0.57, H: 0.37, C_alpha: 0.2, C: 0.5, O: -0.5,  }

