57994-6

Leucine/Alanine [Mass Ratio] in DBS

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Part Descriptions

LP15699-9   Leucine
Leucine, an essential amino acid isomeric with isoleucine, is the most common amino acid found in proteins. It is required for optimal growth in infancy and childhood and for nitrogen equilibrium in adults. It is also involved in maintaining muscles mass by equalizing synthesis and breakdown of proteins. The major food sources of leucine are whole grains, milk and milk products, eggs, meat, soy beans, and leafy vegetables. Leucine toxicity, as seen in decompensated Maple Syrup Urine Disease (MSUD), causes delirium and neurologic compromise, and can be life-threatening. Copyright Text is available under the Creative Commons Attribution/Share-Alike License. See http://creativecommons.org/licenses/by-sa/3.0/ for details. Source: Wikipedia , Leucine (Wikipedia)

LP15699-9   Leucine
An essential branched-chain amino acid important for hemoglobin formation. Source: National Library of Medicine, MeSH 2006

LP15699-9   Leucine
Leucine is an essential nonpolar hydrophobic amino acid with a nonpolar branched-chain R group. It is increased with Maple Syrup Urine Disease (MSUD). (Information from ARUP Laboratories 9/14/06) Source: Regenstrief Institute

LP70161-2   Alanine
Alanine is a non-essential amino acid that exists as two distinct enantiomers: L-alanine and D-alanine. Alanine is one of the primary amino acids (secondary to leucine) used for protein construction. It is produced from pyruvate, exists in high levels in plasma, and is involved in the metabolism of sugar and organic acids.[PubChem: Alanine] Alanine acts as a substrate for alanine aminotransferase (ALT), an enzyme commonly measured to determine liver health. Increased alanine levels are seen in patients with lactic acidosis, carbamoyl phosphate synthetase deficiency, histidinemia, hyperprolinemia, and ornithine transcarbamylase deficiency. In patients with a mitochondrial disease, elevated alanine levels are primarily seen during times of physiologic stress or regression. PMID: 18243024 Source: Regenstrief LOINC

Fully-Specified Name

Component

Leucine/Alanine

Property

MRto

Time

Pt

System

Bld.dot

Scale

Qn

Method

Additional Names

Long Common Name

Leucine/Alanine [Mass Ratio] in DBS

Short Name

Leucine/Alanine DBS

Display Name

Leucine/Alanine (DBS) [Mass ratio]

Consumer Name Alpha Get Info

Leucine/Alanine, Dried blood spot

Basic Attributes

Class

CHEM

Type

Laboratory

First Released

Version 2.29

Last Updated

Version 2.61 (MIN)

Order vs. Observation

Both

Language Variants Get Info

Related Names

• 2-aminopropanoic acid
• ALA
• Alpha alanine
• Blood
• Chemistry
• DBS
• Dried blood spot
• Filter paper
• FP
• L-alanine
• Leu
• Mass concentration ratio
• Mass ratio
• MCRto
• Point in time
• QNT
• Quan
• Quant
• Quantitative
• Random
• WB
• Whole blood

Example Units

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CodeSystem lookup

https://fhir.loinc.org/CodeSystem/$lookup?system=http://loinc.org&code=57994-6

LOINC Copyright

Copyright © 2025 Regenstrief Institute, Inc. All Rights Reserved. To the extent included herein, the LOINC table and LOINC codes are copyright © Regenstrief Institute, Inc. and the Logical Observation Identifiers Names and Codes (LOINC) Committee. See https://loinc.org/license for the full LOINC copyright and license.