Gut cells at different stages of erebosis (IMAGE) RIKEN Caption During erebosis, fluorescent proteins such as GFP and RFP become lost, making cells “black”. In the beginning of erebosis, cells lose cytoplasmic GFP (left bottom cells). Then, erebotic cells lose nuclear GFP (a cell in the center) and nuclear RFP (a cell at the top center). Credit RIKEN Usage Restrictions Credit RIKEN License Original 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.