Figure (IMAGE) Osaka University Caption Kidney consists of many renal tubules. Primary urine is formed by filtration from the blood in glomerulus and excreted via renal tubules as urine. AGT1 is present at renal tubules and reabsorb cystine and other amino acids from urine. Credit Osaka University 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.