Intracellular Zinc / Mucus Production and Progress Mechanism of Obstructive Pulmonary Disease (image) Kumamoto University Share Print E-Mail Caption Pre-mRNA undergoes mRNA splicing which "cuts out" the information necessary for protein synthesis. In obstructive pulmonary diseases (right side of figure) abnormalities occur during mRNA splicing and cause abnormal (hyper-) mucus secretion. Credit Associate Professor Tsuyoshi Syuto Usage Restrictions This image may only be used in conjunction with the accompanying release, or stories written about the work described in the release with reference to the original work. Share Print E-Mail 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.