Urobilinogen, as a Bile Pigment Metabolite, Has an Antioxidant Function
نویسندگان
چکیده
منابع مشابه
Studies on the Determination of Bile Pigments. Vi. Urobilinogen in Urine as Urobilinogen-aldehyde.
THE photometric determination of urobilinogen was proposed by Terwen (i) and employs the reaction of native urobilinogen, plus that derived from ferrous hydroxide reduction of urobilin, with Ehrlich’s reagent, p-dimethylaminobenzaldehyde. This basic approach culminated in the “quantitative” and “semiquantitative” methods of Watson (2,3) with minor modifications by various authors (4). Efforts i...
متن کاملStudies on the determination of bile pigments. III. Standardization of the determination of urobilinogen as urobilinogen-aldehyde.
Several preparations of urobilin and stercobilin were investigated with regard to their value as standards for the determination of urobilinogen and urobilin in biologic specimens. Products of commercial origin were found to be impure and therefore unsuitable for this purpose. Absorptivities were measured for solutions of the pigments in 3% FICI in methanol and for the chromogens, obtained by f...
متن کاملOutstanding bile pigment problems.
In this review of the chemistry, biochemistry and chemical pathology of the bile pigments I am well aware that I shall ask many more questions than I am able to answer. It seems appropriate that the subject should be considered under the five headings: -Chemistry; Formation from Haem Proteins; Transport in the Blood; Conjugation and Transport to the Bile; and Changes in the Gut. I shall conclud...
متن کاملA-a-hydroxymesobiliverdin, a New Bile Pigment
In a previous paper [1] we discussed biliverdin IXa as an intermediate of phycocyanobilin biosynthesis (also compare [2—4]). The experiments involved the incubation of red algae of the species Cyanidium caldarium III-D-2 with the tetrapyrrole precursor 5-aminolevulinic acid. After 2—3 days incubation we observed as a main product a rather polar blue pigment of an as yet unknown structure in the...
متن کاملUrobilinogen-i is a major derivative of bilirubin in bile of homozygous Gunn rats.
Gunn rats lack bilirubin UDP-glycosyltransferases, but diazo-negative derivatives of bilirubin have been described in their bile. In order to investigate this alternative disposal of bilirubin, crude bile samples from Gunn and Wistar rats were directly analysed by h.p.l.c. Besides bilirubin (in Gunn rats) or its glycosides (in Wistar rats), two major compounds were detected. A yellow one corres...
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ژورنال
عنوان ژورنال: Journal of Oleo Science
سال: 2006
ISSN: 1345-8957,1347-3352
DOI: 10.5650/jos.55.191