(IMAGE) Kumamoto University Caption Researchers elucidate how BHLHE40, a transcriptional repressor activated in pancreatic β-cells as a response to hypoxia, inhibits the expression of the MAFA protein, thereby leading to impaired insulin secretion. Credit Professor Kazuya Yamagata Usage Restrictions Do not reuse without permission. 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.