Living HeLa Cells (IMAGE) Technische Universität Dresden Caption This is a microscopic image of living HeLa cells containing a GFP-linked protein (green) and the AID nanobody (magenta). After addition of the plant hormone auxin, the GFP-linked protein is broken down specifically in the cells containing AID nanobody within 30 minutes. Credit © Jörg Mansfeld 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.