Chemistry:Formiminoglutamic acid

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Formiminoglutamic acid
Formiminoglutamic acid.svg
IUPAC name
N-(aminomethylidene)-L-glutamic acid
Other names
3D model (JSmol)
MeSH Formiminoglutamic+acid
Molar mass 174.156 g·mol−1
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
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Infobox references

Formiminoglutamic acid (FIGLU; conjugate base, formiminoglutamate) is an intermediate in the catabolism of L-histidine to L-glutamic acid. It thus is also a biomarker for intracellular levels of folate. The FIGLU test is used to identify vitamin B₁₂ deficiency, folate deficiency, and liver failure or liver disease.[1][2] It is elevated with folate trapping, where it is accompanied by decreased methylmalonic acid, increased folate and a decrease in homocysteine.[3]

See also


  1. Lascelles, P. T.; Donaldson, D. (1989). "Formiminoglutamic Acid (FIGLU) Test". Diagnostic Function Tests in Chemical Pathology. pp. 59–60. doi:10.1007/978-94-009-1846-7_31. ISBN 978-0-7462-0107-7. 
  2. FIGLU+Test at the US National Library of Medicine Medical Subject Headings (MeSH)
  3. Scott, JohnM.; Weir, DonaldG. (15 August 1981). "THE METHYL FOLATE TRAP: A physiological response in man to prevent methyl group deficiency in kwashiorkor (methionine deficiency) and an explanation for folic-acid-induced exacerbation of subacute combined degeneration in pernicious anaemia". The Lancet 318 (8242): 337–340. doi:10.1016/S0140-6736(81)90650-4. ISSN 0140-6736. PMID 6115113.