Channels of Memory (IMAGE) Picower Institute at MIT Caption Red staining in engram cells in the hippocampus indicate expression of (Kir2.1) potassium ion channels. Credit Pignatelli, Tonegawa, <em>et al</em>. Usage Restrictions with credit 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.