C_beta = Atom('CH')
C_gamma_2 = Atom('CH3')
O_gamma_1 = Atom('OH')
bonds = [Bond(C_gamma_2, C_beta), Bond(O_gamma_1, C_beta), ]
pdbmap = [('THR', {'CG2': C_gamma_2, 'CB': C_beta, 'OG1': O_gamma_1, }, ), ]
amber_atom_type = {O_gamma_1: 'OH', C_beta: 'CT', C_gamma_2: 'CT', }
name = 'thr_sidechain'
