ðə dʒˌiːjˌuːˈɛs ɐsˈeɪ, æz wˈɛl æz ˈʌðɚ ɹᵻpˈoːɹɾɚ dʒˈiːn sˈɪstəmz, kæn biː jˈuːzd fɔːɹ ˈʌðɚ kˈaɪndz ʌv stˈʌdiz ˈʌðɚ ðɐn ðə klˈæsɪkəl pɹəmˈoʊɾɚɹ æktˈɪvᵻɾi ɐsˈeɪ.
The GUS assay, as well as other reporter gene systems, can be used for other kinds of studies other than the classical promoter activity assay.