The fluorescence of 9, 10-dioxa-syn-3, 4, 6, 7-tetramethylbimane (bimane) was found to be quenched in the presence of nitrated aromatic amino acid. Bimane peptides containing nitrated amino acid (1a, b) were shown to be useful fluorogenic substrates for the assay of angiotensin I converting enzyme (ACE) from rabbit lung, similar to bimane substrate containing tryptophan (3) previously reported. Among these bimane substrates, substrate 3 was shown to be a potent fluorogenic substrate for microdetermination of the ACE level in human serum.
在硝化芳香族
氨基酸存在的情况下,9, 10-二氧杂-3, 4, 6, 7-四甲基
联苯胺(
联苯胺)的荧光被淬灭。含有硝化
氨基酸(1a, b)的
联苯胺肽被证明是检测兔肺
血管紧张素I
转化酶(ACE)的有效荧光底物,与之前报道的含有色
氨酸(3)的
联苯胺底物类似。在这些
联苯胺底物中,底物3被证明是检测人血清中ACE
水平的高效荧光底物。