Liver Cells (IMAGE) Weizmann Institute of Science Caption Staining of normal liver tissue (upper row, four images from right) reveals high levels of four different urea cycle enzymes (brown or reddish-brown), whereas liver cancer samples (bottom row, four images from right) have low levels of these enzymes. In In contrast, markers for cell growth are low in the normal tissue (upper row, left) and extremely high in the liver cancer (bottom row, left). Image generated with the help of Dr. Raya Eilam Credit Weizmann Institute of Science Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.