Side View Blue Crypts (IMAGE) University of North Carolina Health Care Caption These are fluorescent images of the side view of two synthetic crypts. Blue: nuclei of the cells. Red: proliferating stem cells in similar location to those in the human colon. Credit Scott Magness, PhD, UNC School of Medicine Usage Restrictions credit properly 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.