Formiminoglutamic acid

Formiminoglutamic acid
Names
	IUPAC name N-(aminomethylidene)-L-glutamic acid
	Other names FIGLU
Identifiers
CAS Number	816-90-0 ;
3D model (JSmol)	Interactive image;
ChemSpider	388370 ;
ECHA InfoCard	100.011.308
MeSH	Formiminoglutamic+acid
PubChem CID	909;
UNII	YV703N7VOG ;
	SMILES C(CC(=O)O)C(C(=O)O)N=CN;
Properties
Chemical formula	C6H10N2O4
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). verify (what is ?) 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]

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[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 U.S. 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. S2CID 29977127.

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