Version 2.74

Part Descriptions

LP14976-2   Cystine
Cystine is an oxidized dimeric form of cysteine. It is formed by linking two cysteine residues via a disulfide bond (cys-S-S-cys) between the -SH groups. Cystine was discovered in 1810 but was not recognized as a component of proteins until it was isolated from the horn of a cow in 1899.1 Cystine is found in high concentrations in the cells of the immune system, skeletal and connective tissues, skin, digestive enzymes, and in hair. Hair and skin are 10-14% cystine. Copyright Text is available under the Creative Commons Attribution/Share-Alike License. See for details. Source: Wikipedia, Cystine (Wikipedia)

LP14976-2   Cystine
Union of two cysteine molecules Source: Regenstrief Institute

LP14976-2   Cystine
A covalently linked dimeric nonessential amino acid formed by the oxidation of CYSTEINE. Two molecules of cysteine are joined together by a disulfide bridge to form cystine. Source: National Library of Medicine, MeSH 2006

LP14976-2   Cystine
Cystinuria is an inherited amino acid transport problem resulting in large amounts of cystine being excreted in the urine. Cystinuria often causes the formation of staghorn calculi or multiple large, bilateral stones. Urinary tract obstruction, infection, and renal failure are common, especially in men, due to the size and shape of the stones. Recurrence of cystine stones is common following surgical treatment. Therapy includes reducing excretion and increasing solubility of cystine.

Cystine is a hydrophilic amino acid with uncharged polar groups. Cystines' sulfhydryl group is functional in the activity of many enzymes. Increased in cystinuria which is caused by mutations in the SLC3A1 and SLC7A9 genes. (Information from ARUP Laboratories 9/14/06) Source: Regenstrief Institute

Fully-Specified Name


Additional Names

Short Name
Cystine 24h Ur-mCnc
Display Name
Cystine (24H U) [Mass/Vol]
Consumer Name Alpha Get Info
Cystine, Urine

Basic Attributes

First Released
Version 2.07
Last Updated
Version 2.73
Order vs. Observation
Common Test Rank Get Info

Member of these Groups Get Info

LOINC Group Group Name
LG43305-8 Cystine|24H|Urine
LG35235-7 Cystine|MCnc|Urine

Language Variants Get Info

Tag Language Translation
es-AR Spanish (Argentina) cistina:concentración de masa:24 horas:orina:cuantitativo:
es-ES Spanish (Spain) Cistina:Concentración de masa:24 horas:Orina:Qn:
es-MX Spanish (Mexico) Cistina:Concentración de masa:24H:Orina:Cuantitativo:
et-EE Estonian (Estonia) Tsüstiin:MCnc:24 tunni:U:Qn:
Synonyms: Kvantitatiivne Uriin
fr-CA French (Canada) Cystine:Concentration de masse:24 h:Urine:Quantitatif:
fr-FR French (France) Cystine:Masse/Volume:24H:Urine:Numérique:
fr-BE French (Belgium) Cystine:Concentration de masse:24 h:Urine:Quantitatif:
it-IT Italian (Italy) Cistina:MCnc:24h:Urine:Qn:
Synonyms: 24 Ore Chimica Concentrazione di Massa
ko-KR Korean (Korea, Republic Of) 시스틴:질량농도:24시간:뇨:정량:
nl-NL Dutch (Netherlands) cystine:massa/volume:24 uur:urine:kwantitatief:
Synonyms: 24U
pt-BR Portuguese (Brazil) Cistina:MCnc:24H:Urina:Qn:
Synonyms: Cys-Cys; Dicysteine; Mass concentration; Level; 1 day; 24 hours; 24HR; Ur; UR; Urn; UA; Quantitative; QNT; Quant; Quan; Chemistry
ru-RU Russian (Russian Federation) Цистин:МассКонц:24 часа:Моча:Колич:
Synonyms: Количественный Массовая концентрация
tr-TR Turkish (Turkey) Sistin:KütlKons:24Sa:İdrar:Kant:
zh-CN Chinese (China) 胱氨酸:质量浓度:24小时:尿液:定量型:
Synonyms: 1天;1日;24.0小时;一天;一日;二十四个小时;二十四小时 Cys-Cys;双巯丙氨酸 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 水平;浓度;质量浓度(单位体积)

Example Units

Unit Source
mg/dL Example UCUM Units

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

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