isoriboflavin

i·so·ri·bo·fla·vin

(ī'sō-rī'bō-flā'vin),
8-Demethyl-6-methylriboflavin; a riboflavin antimetabolite, differing from riboflavin in that the methyl groups on the isoalloxazine nucleus are in the 6,7 positions rather than the 7,8.
References in periodicals archive ?
Liquid-chromatographic measurement of riboflavin in serum and urine with isoriboflavin as internal standard.
Multianalyte quantification of vitamin [B.sub.6] and [B.sub.2] species in the nanomolar range in human plasma by liquid chromatography--tandem mass spectrometry
Briefly, 50 [micro]L of isoriboflavin (internal standard) was added to 300 [micro]L of plasma and calibrators.
We appreciate the donation of the isoriboflavin internal standard by Dr.
Effect of riboflavin status on the homocysteine-lowering effect of folate in relation to the MTHFR (C677T) genotype
Briefly, a 40-[micro]L plasma sample was mixed with 400 [micro]L of trichloroacetic acid (100 g/L) containing 15 nmol/L isoriboflavin (internal standard), and 330 [micro]L of the supernatant was neutralized by the addition of 108 [micro]L of [K.
Riboflavin, flavin mononucleotide, and flavin adenine dinucleotide in human plasma and erythrocytes at baseline and after low-dose riboflavin supplementation
Trichloroacetic acid (75 [micro]L of a 100 g/L solution) containing 15 nmol/L isoriboflavin was added to the samples, and 75 [micro]L of the supernatant was neutralized by the addition of 24 [micro]L of 2 mol/L [K.
Riboflavin as a determinant of plasma total homocysteine: effect modification by the methylenetetrahydrofolate reductase C677T polymorphism
Plasma samples (500 [micro]L) were mixed with 1500 [micro]L of ice-cold 100 g/L TCA containing 15 nmol/L isoriboflavin, which served as an internal standard.
Isoriboflavin served as the reference calibrator for riboflavin, FMN, and FAD, and riboflavin was used as the reference calibrator for isoriboflavin.
To study the stability of the internal standard in TCA used for plasma protein precipitation, we studied aliquots of 100 g/L TCA containing 150 nmol/L isoriboflavin incubated for 1, 2, 4, 7, and 14 days.
We investigated the stability of the vitamers and the internal standard in TCA-treated plasma before neutralization by adding 500 nmol/L riboflavin, FMN, FAD, or isoriboflavin to the samples.
Quantification of riboflavin, flavin mononucleotide, and flavin adenine dinucleotide in human plasma by capillary electrophoresis and laser-induced fluorescence detection
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