Immature Blood Cells (IMAGE) Cold Spring Harbor Laboratory Caption Immature blood cells (stained purple) do not divide into enough functioning red blood cells when defective. Researchers have discovered how to stop the protein signaling pathway that makes this defect so dangerous. Credit Zhang lab/CSHL, 2019 Usage Restrictions Attribution needed 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.