| L-Tyrosine or tyrosine (symbol Tyr or Y) or 4-hydroxyphenylalanine is one of the 20 standard amino acids that are used by cells to synthesize proteins. It is a conditionally essential amino acid with a polar side group. The word "tyrosine" is from the Greek tyrós, meaning cheese, as it was first discovered in 1846 by German chemist Justus von Liebig in the protein casein from cheese. It is called tyrosyl when referred to as a functional group or side chain. While tyrosine is generally classified as a hydrophobic amino acid, it is more hydrophilic than phenylalanine. It is encoded by the codons UAC and UAU in messenger RNA.
The one-letter symbol Y was assigned to tyrosine for being alphabetically nearest of those letters available. Note that T was assigned to the structurally simpler threonine, U was avoided for its similarity with V for valine, W was assigned to tryptophan, while X was reserved for undetermined or atypical amino acids. The mnemonic tYrosine was also proposed. |
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| InChI=1S/C12H4Cl4O2/c13-5-1-9-10(2-6(5)14)18-12-4-8(16)7(15)3-11(12)17-9/h1-4H |
| HGUFODBRKLSHSI-UHFFFAOYSA-N |
| Clc1cc2Oc3cc(Cl)c(Cl)cc3Oc2cc1Cl |
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persistent organic pollutant
Any environmental contaminant that is resistant to environmental degradation through photolytic, biological or chemical processes. Such substances can have significant impact on health and the environment, as they persist in the environment, bioaccumulate in animal tissue and so biomagnify in food chains.
(via polychlorinated dibenzodioxine )
(via polychlorinated dibenzodioxines and related compounds )
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xenobiotic
A xenobiotic (Greek, xenos "foreign"; bios "life") is a compound that is foreign to a living organism. Principal xenobiotics include: drugs, carcinogens and various compounds that have been introduced into the environment by artificial means.
(via dibenzodioxine )
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View more via ChEBI Ontology
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2,3,7,8-tetrachlorooxanthrene
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2,3,7,8-Tetrachlorodibenzo-p-dioxin
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KEGG COMPOUND
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2,3,7,8-Tetrachlorodibenzodioxin
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KEGG COMPOUND
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Dioxin
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ChemIDplus
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dioxine
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ChemIDplus
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PCDD 48
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KEGG COMPOUND
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TCDD
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KEGG COMPOUND
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Tetrachlorodibenzodioxin
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KEGG COMPOUND
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tetradioxin
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NIST Chemistry WebBook
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1746-01-6
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CAS Registry Number
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NIST Chemistry WebBook
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1746-01-6
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CAS Registry Number
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ChemIDplus
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271116
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Beilstein Registry Number
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Beilstein
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366537
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Gmelin Registry Number
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Gmelin
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