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uroporphyrin

   Also found in: Encyclopedia 0.01 sec.
uroporphyrin /uro·por·phy·rin/ (-por´fĭ-rin) any of several porphyrins produced by oxidation of uroporphyrinogen; one or more are excreted in excess in the urine in several of the porphyrias.
u·ro·por·phy·rin (yr-pôrf-rn)
n.
A porphyrin excreted in the urine, such as urobilin.

uroporphyrin
[yoo͡r′ōpôr′firin]
a porphyrin normally excreted in the urine in small amounts. See also uroporphyria.

uroporphyrin [u″ro-por´fĭ-rin]
any of several porphyrins produced by oxidation of uroporphyrinogen; one or more are excreted in excess in the urine in several of the porphyrias.

uroporphyrin
one of a group of porphyrins produced during biosynthesis of natural porphyrins and excreted in urine. There are two isomers I and III.


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Elevated urine levels of uroporphyrin and coproporphyrin are diagnostic.
The disease is characterized biochemically by marked increases in uroporphyrin and heptaporphyrin in urine (3).
5] M) to liver cell cultures completely abolished the induction of uroporphyrin formation by 3,3',4,4'-tetra-chlorobiphenyl (TCB), suggesting that the uroporphyrin induction response may be regulated by the availability of heme in the liver cell.
 
 
 
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