申请人:——
公开号:US20020119507A1
公开(公告)日:2002-08-29
The present invention provides novel glutathione-dependent formaldehyde dehydrogenase that makes possible quantitative measurement of formaldehyde by cycling reaction, and a determination method of formaldehyde and biological components, such as creatinine, creatine, homocysteine and the like, which produces formaldehyde as a reaction intermediate. In addition, the present invention provides a reagent kit for the above-mentioned determination method. The present invention provides a novel determination method of a homocysteine using transferase utilizing homocysteine and other compound as a pair of substrates. Particularly, the present invention provides a determination method of homocysteine which includes bringing betaine-homocysteine methyltransferase and dimethylglycine oxidase into contact with a sample and measuring produced hydrogen peroxide or formaldehyde. Moreover, the present invention provides novel dimethylglycine oxidase stable to thiol compound, which is suitably used for the measurement. The present invention provides a reagent kit used for any of the above-mentioned determination methods of homocysteines.
本发明提供了一种新型的谷胱甘肽依赖性甲醛脱氢酶,它使得通过循环反应定量测量甲醛成为可能,并提供了一种测定甲醛和生物成分(如肌酐、肌酸、同型半胱氨酸等)的方法,该方法产生甲醛作为反应中间体。此外,本发明还提供了用于上述测定方法的试剂盒。本发明提供了一种新型的利用同型半胱氨酸和其他化合物作为一对底物的转移酶测定同型半胱氨酸的方法。特别是,本发明提供了一种同型半胱氨酸的测定方法,其中包括将甜菜碱-同型半胱氨酸甲基转移酶和二甲基甘氨酸氧化酶与样品接触,并测量产生的过氧化氢或甲醛。此外,本发明还提供了一种对巯基化合物稳定的新型二甲基甘氨酸氧化酶,适用于测量。本发明提供了用于上述同型半胱氨酸测定方法的试剂盒。