Structure of the GPI Anchored Proteins (IMAGE) Osaka University Caption Precursor proteins and GPI are synthesized separately in the ER and the protein is attached to the completed GPI anchor and further modified and transported to the plasma membrane. 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.