Staining of Receptors (IMAGE) CNRS Caption Staining of receptors and pit for endocytosis, the process by which molecules are transported inside a cell. Credit Jennifer PETERSEN/Daniel CHOQUET/IINS/CNRS Photo library. 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.