Electron Micrograph of a Section Through a Eukaryotic Yeast Cell (image) Max Delbrück Center for Molecular Medicine in the Helmholtz Association Share Print E-Mail Caption Mitochondrial cross-sections appear as oval structures. The inset shows a magnification of a mitochondrium, in which cristae appear as membrane invaginations. Crista junctions are marked by an asterisk. Credit Image: Daumke lab, MDC Usage Restrictions None 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.