dʒˌiːjˌuːˈɛs ɐsˈeɪz kæn biː kˈæɹid ˈaʊt ɪnðə pɹˈɛzəns ʌv pətˈæsiəm fˈɛɹɪsɪˌænaɪd tə pɹɪvˈɛnt ðə stˈeɪn fɹʌm dᵻfjˈuːzɪŋ.
GUS assays can be carried out in the presence of potassium ferricyanide to prevent the stain from diffusing.