Linear Mucin (IMAGE) University of North Carolina Health Care Caption This is an electron microscopy of a linear mucin responsible for keeping mucus at proper thickness and stickiness. Credit M. Kesimer/J. Griffith, 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.