The insertion of the uidA gene will cause production of GUS, which can then be detected using various glucuronides as substrates.
ðɪ ɪnsˈɜːʃən ʌvðə jˈuːɪd ɐ dʒˈiːn wɪl kˈɔːz pɹədˈʌkʃən ʌv dʒˌiːjˌuːˈɛs, wˌɪtʃ kæn ðˈɛn biː dɪtˈɛktᵻd jˈuːzɪŋ vˈɛɹiəs ɡlˈuːkjʊɹɹˌɑːnaɪdz æz sˈʌbstɹeɪts.