Collecting Ducts (IMAGE) Kumamoto University Caption Collecting ducts derived from iPS cells with the homozygous PKD1 gene mutation strongly reacted with forskolin to form cysts. Collecting ducts derived from iPS cells with the heterozygous PKD1 gene mutation, as well as those derived from patient iPS cells, formed cysts, although partially. Credit Professor Ryuichi Nishinakamura Usage Restrictions This image may only be used in conjunction with the accompanying release, or stories written about the work described in the release with reference to the original work. 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.