Cultured H35 hepatoma cells release a cytotoxic factor in response to irradiation with X-rays. When the conditioned medium from irradiated cells is given to nonirradiated cells, growth is inhibited ...

The presence of all five enzymes of the ornithine-urea cycle has been demonstrated in the liver of the African lungfish Protopterus aethiopicus. Levels of activity of the rate-limiting enzymes, ...

We studied two related families (HHH013 and HHH015) with the hyperornithinemia-hyperammonemia-homocitrullinuria (HHH) syndrome, a disorder of the urea cycle and ornithine degradation pathway, who have ...

Targeted inhibition of an enzyme linked to the urea cycle called ornithine decarboxylase 1 (ODC1) in star-shaped cells in the brain called astrocytes, could prove beneficial in restoring memory ...