C_beta = Atom('CH2')
C_epsilon = Atom('CH3')
C_gamma = Atom('CH2')
S_delta = Atom('S')
bonds = [Bond(C_gamma, C_beta), Bond(S_delta, C_gamma), Bond(C_epsilon, S_delta), ]
pdbmap = [('MET', {'SD': S_delta, 'CE': C_epsilon, 'CG': C_gamma, 'CB': C_beta, }, ), ]
amber_atom_type = {C_beta: 'CT', C_gamma: 'CT', C_epsilon: 'CT', S_delta: 'S', }
name = 'met_sidechain'
