35572-7

Phenylalanine/Tyrosine [Molar ratio] in DBS

Active

Part Descriptions

LP15792-2   Phenylalanine
Phenylalanine is an essential alpha-amino acid. It exists in two forms, a D and an L form, which are enantiomers (mirror-image molecules) of each other. It has a benzyl side chain and its name comes from its chemical structures that consists of a phenyl group substituted for one of the hydrogens in the side chain of alanine. Because of its phenyl group, phenylalanine is an aromatic compound that at room temperature exists as a white, powdery solid. L -phenylalanine (LPA) is an electrically-neutral amino acid and its enantiomer, D -phenylalanine (DPA), can be synthesized artificially. L -phenylalanine can also be converted into L -tyrosine, another one of the twenty protein-forming amino acids. 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, Phenylalanine (Wikipedia)

LP32175-9   Tyrosine
Tyrosine (from the Greek tyros, meaning cheese, as it was first discovered in cheese[ citationneeded ]), 4-hydroxyphenylalanine, or 2-amino-3(4-hydroxyphenyl)-propanoic acid, is one of the 20 amino acids that are used by cells to synthesize proteins. It has a phenol side chain with a hydroxyl group. Upon the location of the hydroxyl group, there are three structural isomers of Tyr, namely para-Tyr (p-Tyr), meta-Tyr (m-Tyr) and ortho-Tyr (o-Tyr). Enzymatically, only the first isomer (p-Tyr) is produced from L-Phe by the Phe-hydroxylase enzyme. The other two isoforms, m-Tyr and o-Tyr can be produced as a consequence of free radical attack on Phe in states with increased oxidative stress. 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, Tyrosine (Wikipedia)

LP32175-9   Tyrosine
A non-essential amino acid. In animals it is synthesized from PHENYLALANINE. It is also the precursor of EPINEPHRINE; THYROID HORMONES; and melanin. Source: National Library of Medicine, MeSH 2006

Fully-Specified Name

Component

Phenylalanine/Tyrosine

Property

SRto

Time

Pt

System

Bld.dot

Scale

Qn

Method

Additional Names

Long Common Name

Phenylalanine/Tyrosine [Molar ratio] in DBS

Short Name

Phe/Tyr DBS-sRto

Display Name

Phenylalanine/Tyrosine (DBS) [Molar ratio]

Consumer Name Alpha Get Info

Phenylalanine/Tyrosine, Dried blood spot

Basic Attributes

Class

CHEM

Type

Laboratory

First Released

Version 2.13

Last Updated

Version 2.73

Order vs. Observation

Observation

Common Test Rank Get Info

3731

Member of these Panels

Language Variants Get Info

Related Names

• Blood
• Chemistry
• DBS
• Dried blood spot
• Filter paper
• FP
• Phe
• Phe+Tyr
• Phenylalanine +Tyrosine
• PKU
• Point in time
• PPA
• QNT
• Quan
• Quant
• Quantitative
• Random
• Scrto
• Substance concentration ratio
• Substance ratio
• Tyr
• WB
• Whole blood

Example Units

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CodeSystem lookup

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