ɪɾ ɪz haɪpˈɑːθəsˌaɪzd ðætðə stˈɑːɹt dəmˈeɪn fˈɔːɹmz ɐ pˈɑːkɪt ɪn sənt ˌeɪˈɑːɹ ðæt bˈaɪndz sˈɪŋɡəl kəlˈɛstɚɹˌɑːl mˈɑːlɪkjˌuːlz fɔːɹ dᵻlˈɪvɚɹi tə pˈiː fˈoːɹhˈʌndɹɪd fˈɪfti ˌɛssˌiːsˈiː.
It is hypothesized that the START domain forms a pocket in StAR that binds single cholesterol molecules for delivery to P450scc.