Navigation Links
Urea cycle


The Urea Cycle is a cycle of biochemical reactions occurring in many animal organisms that produces urea from ammonia. This cycle, also known as ornithine cycle, was the first metabolic cycle discovered (Krebs and Hensenleit, 1932)

Urea is much less toxic than ammonia, therefore organisms which can't easily and quickly remove ammonia usually have to convert it to some other substance, like urea or uric acid. Insufficiency of the urea cycle occurs in some genetic disorders (inborn errors of metabolism), and in liver failure. The result in liver failure is accumulation of nitrogenous waste, mainly ammonia, which leads to hepatic encephalopathy.

Reactions of cycle:

Summary reaction:

External Links

http://www.ncbi.nlm.nih.gov/books/bv.fcgi?rid=bnchm.figgrp.3102


'"/>


(Date:4/22/2014)... Coral Gables, Fla. (April 21, 2014) -- There are ... out their feathers and spread their colorful tails; satin ... them with blue and shiny objects; and European bitterling ... Each species has evolved a unique method to communicate ... "Signaling can have profound fitness ...
(Date:4/22/2014)... FL, April 22, 2014 Scientists from the Florida ... a protein complex that plays a critical but previously ... The study, which showed a novel role for a ... in the journal eLife , a publisher supported ... Society and the Wellcome Trust. , "This is a ...
(Date:4/22/2014)... Ltd.,s nanotechnology expert will present a poster ... the 7th International Nanotoxicology Congress to be ... Dr. Monita Sharma will outline a strategy consistent with ... Sciences, " Toxicity Testing in the 21st Century: A ... non-animal methods involving human cells and cell lines for ...
Breaking Biology News(10 mins):Best practices in communication for the animal world 2Best practices in communication for the animal world 3Scientists identify critical new protein complex involved in learning and memory 2
... jerks its head uncontrollably for no apparent reason. There ... people, most notably trigeminal neuralgia, and headshaking in horses. ... and treating the condition in horses, the pathology of ... A recent study led by academics ...
... PARSIPPANY, NJ (November 14, 2012) Parents may have some ... study, funded by Pinnacle Foods, Birds Eye brand and published ... to the plate led to more positive evaluations of both ... vegetables with dinner, participants believed the main course would taste ...
... lung cancer research team reports that lung cancer stem ... offering a new avenue for investigating immunotherapy treatment options ... Morris, MD, and his colleagues report their findings in ... , a peer-reviewed online publication that features original research ...
Cached Biology News:Study investigates headshaking in horses 2New study reveals more inspiring reasons to serve veggies at dinner 2Stem cell finding could advance immunotherapy for lung cancer 2
Other biology definitionOther Tags