申请人:RCR Scientific, Inc.
公开号:US05210022A1
公开(公告)日:1993-05-11
A chromogenic .beta.-galactosidase substrate producing an insoluble precipitate of a first color when reacted upon by .beta.-galactosidase and a chromogenic .beta.-glucuronidase substrate producing an insoluble precipitate of a second, contrasting color when reacted upon by .beta.-glucuronidase are combined in a test medium for quantitatively identifying and differentiating general coliforms and E. coli. The .beta.-galactosidase substrate 5-bromo-4-chloro-3-indolyl-.beta.-D-galactopyranoside which produces an indigo blue precipitate when reacted upon by .beta.-galactosidase may be used with one of the novel compounds 6-chloroindolyl-.beta.-D-glucuronide, 4,6-dichloroindolyl-.beta.-D-glucuronide, 6,7-dichloroindolyl-.beta.-D-glucuronide, and 4,6,7-trichloroindolyl-.beta.-D-glucuronide, which produce mauve or magenta precipitates when reacted upon by .beta.-glucuronidase. The .beta.-glucuronidase substrate 5-bromo-4-chloro-3-indolyl-.beta.-D-glucuronide, which produces an indigo blue precipitate when reacted upon by .beta.-glucuronidase may be used with one of the novel compounds 6-chloroindolyl-.beta.-D-galactoside, 4,6-dichloroindolyl-.beta.-D-galactoside, 6,7-dichloroindolyl-.beta.-D-galactoside, and 4,6,7-trichloroindolyl-.beta.-D-galactoside which produce mauve or magenta precipitates when reacted upon by .beta.-galactosidase.
一种色原性β-半乳糖苷酶底物,当与β-半乳糖苷酶反应时产生第一种颜色的不溶性沉淀,一种色原性β-葡萄糖醛酸酶底物,当与β-葡萄糖醛酸酶反应时产生第二种对比颜色的不溶性沉淀,结合在测试介质中,用于定量鉴定和区分一般的大肠杆菌和E. coli。β-半乳糖苷酶底物5-溴-4-氯-3-吲哚基-β-D-半乳糖苷,当与β-半乳糖苷酶反应时产生靛蓝色沉淀,可与新化合物之一6-氯吲哚基-β-D-葡萄糖醛酸酯,4,6-二氯吲哚基-β-D-葡萄糖醛酸酯,6,7-二氯吲哚基-β-D-葡萄糖醛酸酯和4,6,7-三氯吲哚基-β-D-葡萄糖醛酸酯一起使用,当与β-葡萄糖醛酸酶反应时产生紫红色沉淀。β-葡萄糖醛酸酶底物5-溴-4-氯-3-吲哚基-β-D-葡萄糖醛酸酯,当与β-葡萄糖醛酸酶反应时产生靛蓝色沉淀,可与新化合物之一6-氯吲哚基-β-D-半乳糖苷,4,6-二氯吲哚基-β-D-半乳糖苷,6,7-二氯吲哚基-β-D-半乳糖苷和4,6,7-三氯吲哚基-β-D-半乳糖苷一起使用,当与β-半乳糖苷酶反应时产生紫红色沉淀。