Views of 3D pore protein pannexin 1 (image) Cold Spring Harbor Laboratory Share Print E-Mail Caption Six microscopic views of the 3D pore protein pannexin 1. The images were captured using cryo-electron microscopy. Each pore protein is about 6 nm wide. This means that well over 300,000 could fit on the head of a pin (2 mm). Credit Furukawa lab/CSHL, 2020 Usage Restrictions Attribution needed 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.