Version 2.77

Part Descriptions

LP15432-5   Beta aminoisobutyrate
3-Aminoisobutyric acid is a product formed by the catabolism of thymine. Copyright Text is available under the Creative Commons Attribution/Share-Alike License. See for details. Source: Wikipedia, Wikipedia

LP15432-5   Beta aminoisobutyrate
Beta aminoisobutyric acid (BAIB) is a nonprotein amino acid that is an end product of pyrimidine metabolism. The R and S enantiomers (previously named D-(minus)-BAIB and L-plus-BAIB) are produced from thymine and L-valine, respectively. Under normal circumstances, urine contains predominantly R-BAIB (from thymine) because it is eliminated by filtration and tubular secretion, while plasma contains about 80% S-BAIB (from valine), which is reabsorbed in the kidneys. In patients with dihydropyrimidine dehydrogenase deficiency, thymine catabolism is decreased, which results in moderately decreased CSF concentration and markedly decreased plasma concentration of BAIB. On the other hand, urine BAIB is elevated despite decreased breakdown of thymine, which indicates that there must be cross-over in the thymine and valine degradation pathways. PMID: 14705962 Deficiency of D-beta-aminoisobutyrate:pyruvate aminotransferase (EC , an enzyme that is involved in the catabolism R-BAIB, also results in elevated urine BAIB and is associated with hyperuricemia. [OMIM: 210100] Source: Regenstrief LOINC, PMID: 14705962

LP32035-5   Creatinine
Creatinine or creatine anhydride, is a breakdown product of creatine phosphate in muscle. The loss of water molecule from creatine results in the formation of creatinine. It is transferred to the kidneys by blood plasma, whereupon it is eliminated by glomular filtration and partial tubular excretion. Creatinine is usually produced at a fairly constant rate and measuring its serum level is a simple test. A rise in blood creatinine levels is observed only with marked damage to functioning nephrons; therefore this test is not suitable for detecting early kidney disease. Creatine and creatinine are metabolized in the kidneys, muscle, liver and pancreas. Copyright Copyright ©2005-2009 Genome Alberta (Reference to original publication: Wishart DS, Knox C, Guo AC, et al. HMDB: a knowledgebase for the human metabolome. Nucleic Acids Res. 2009 37(Database issue):D603-610.) Source: Human Metabolome Database, Creatinine

Fully-Specified Name

Beta aminoisobutyrate/Creatinine

Additional Names

Short Name
B-AIB/Creat Ur-Rto
Display Name
Beta aminoisobutyrate/Creatinine (U) [Ratio]
Consumer Name Alpha Get Info
Beta aminoisobutyrate/Creatinine, Urine

Basic Attributes

First Released
Version 2.00
Last Updated
Version 2.73
Order vs. Observation
Common Test Rank Get Info

Member of these Panels

LOINC Long Common Name
35087-6 Amino acids panel - Urine

Member of these Groups Get Info

LOINC Group Group Name
LG35668-9 Beta aminoisobutyrate/Creatinine|Ratio|Urine

Language Variants Get Info

Tag Language Translation
de-AT German (Austria) Synonyms: GABA/Krea-Rto/U
de-DE German (Germany) Beta-Aminoisobutyrat/Creatinin:Verhältnis:Zeitpunkt:Urin:Quantitativ:
es-AR Spanish (Argentina) beta aminoisobutirato/creatinina:relación:punto en el tiempo:orina:cuantitativo:
es-ES Spanish (Spain) Beta aminoisobutirato/Creatinina:Fracción:Punto temporal:Orina:Qn:
Synonyms: Cuantitativo
es-MX Spanish (Mexico) Beta aminoisobutirato / creatinina:Proporción:Punto temporal:Orina:Cuantitativo:
et-EE Estonian (Estonia) Beetaaminoisobutüraat/kreatiniin:Suhe:Pt:U:Qn:
Synonyms: Juhuslik Kvantitatiivne Uriin
fr-CA French (Canada) Bêta-aminoisobutyrate/Créatinine:Ratios:Temps ponctuel:Urine:Quantitatif:
fr-FR French (France) Bêta aminoisobutyrate/créatinine:Ratio:Ponctuel:Urine:Numérique:
fr-BE French (Belgium) Béta-aminoisobutyrate/Créatinine:Ratios:Temps ponctuel:Urine:Quantitatif:
it-IT Italian (Italy) Beta aminoisobutirrato/Creatinina:Rapporto:Pt:Urine:Qn:
Synonyms: Chimica Punto nel tempo (episodio)
ko-KR Korean (Korea, Republic Of) 베타 아미노이소뷰티레이트/크레아티닌:비율:검사시점:뇨:정량:
nl-NL Dutch (Netherlands) bèta-amino-isobutyraat/creatinine:verhouding:moment:urine:kwantitatief:
Synonyms: kreatinine
pt-BR Portuguese (Brazil) Beta aminoisobutirato/Creatinina:Ratio:Pt:Urina:Qn:
Synonyms: ; B-AIB; 3-aminoisobutyrate; 3-aminoisobutyric acid; Creat; CR; B-AIB; Rto; Point in time; Random; Ur; UR; Urn; UA; Quantitative; QNT; Quant; Quan; B; Chemistry; UCr
ru-RU Russian (Russian Federation) Бета аминоизобутират/Креатинин:Отношение:ТчкВрм:Моча:Колич:
Synonyms: Бета-аминоизобутират Количественный Коэффициент;Соотношение;Пропорция Точка во времени;Момент
tr-TR Turkish (Turkey) Beta aminoizobütirat/Kreatinin:Oran:Zmlı:İdrar:Kant:
zh-CN Chinese (China) Beta 氨基异丁酸/肌酐:比率:时间点:尿液:定量型:
Synonyms: 3-氨基异丁酸;B-AIB;Beta-氨基异丁酸;β氨基异丁酸;β-氨基异丁酸 B CR;Creat;肌氨酸酐;肌酸内酰胺;肌酸酐 UCr β 化学;化学检验项目;化学检验项目类;化学类;化学试验;非刺激耐受型化学检验项目;非刺激耐受型化学检验项目类;非刺激耐受型化学试验;非刺激耐受型化学试验类 可用数量表示的;定量性;数值型;数量型;连续数值型标尺 尿;小便;下泉 尿液肌酐 尿液肌酸酐 尿肌酸酐 时刻;随机;随意;瞬间 来自于不同体系的两个观察指标之比;比;比值 肌酸内酰胺 贝塔

Example Units

Unit Source
umol/g{creat} Example UCUM Units

LOINC Terminology Service (API) using HL7® FHIR® Get Info

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