ðˈʌs ɹˈoʊɾeɪmɚ kæn biː ᵻlˈɪmᵻnˌeɪɾᵻd ɪf ˌɛni ɔːltˈɜːnətˌɪv ɹˈoʊɾeɪmɚ fɹʌmðə sˈɛt æt kəntɹˈɪbjuːts lˈɛs tə ðə tˈoʊɾəl ˈɛnɚdʒi ðɐn .
Thus rotamer  can be eliminated if any alternative rotamer from the set at  contributes less to the total energy than .