Protein scissors (IMAGE) Vilnius University Caption The cryogenic electron microscope structure of the A4p-activated (green) CalpL protein filament (violet) from Candidatus Cloacimonas acidaminovorans (PDB ID: 9EYJ). Credit Figure was prepared by Dalia Smalakyte and Giedre Tamulaitiene. Usage Restrictions Credit must be given to the creators. 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.