sˈɪns ˈæɾəmz ɪn pɹˈoʊtiːnz ɑːɹ ɐsˈuːmd tʊ ˌɪntɚɹˈækt ˈoʊnli baɪ tˈuːbˈɑːdi pətˈɛnʃəlz, ðɪ ˈɛnɚdʒi mˈeɪ biː ɹˈɪʔn̩
Since atoms in proteins are assumed to interact only by two-body potentials, the energy may be written