EMBL Keynote Lecture: The long and winding road to in situ structural biology with cryo-ET

Value of the Information & Strength of the Argument

The value of the information is high, as it provides a rare insider perspective on the maturation of a cutting-edge technology. The speaker argues convincingly that cryo-ET did not emerge spontaneously but was the result of persistent scientific effort and collaboration with industry. The narrative is supported by personal anecdotes and milestones, such as the 2007 first FIB milling attempts and the 2010 publication, which strengthens the credibility of the account. The argumentation is logically structured, moving from historical foundations to present-day solutions and future outlook. The speaker emphasizes the importance of automation and open-source tools, and critically discusses the limitations of current methods, making the argumentation balanced and scientifically honest.

Scientific Rigor, Source Quality, Title Accuracy

The talk demonstrates scientific rigor by systematically referencing key publications from the field, including works by Marton (1934), Ruska (1942), Hart (1968), Hoppe (1983), and more recent studies on lamella preparation (Villa et al., 2016; Engel et al., 2016). However, the speaker does not provide specific citations or URLs during the lecture, relying on the audience’s familiarity with the literature. The title is fully appropriate, capturing the long evolutionary path of cryo-ET and its sample preparation techniques. The content is technically detailed and specialized, appropriate for a seminar audience, and the talk is coherent with the overall theme of the EMBO workshop. No comments were provided to assess audience reception, but the lecture adheres to the expected level of expert discourse.

The title accurately reflects the content: the speaker traces the arduous path of cryo-ET from early attempts to current applications, emphasizing technical hurdles and breakthroughs.

8/10

The talk is delivered by a leading researcher in cryo-ET, providing a first-hand account of the field's evolution. Technical claims are grounded in published work and personal experience, though no specific quantitative data or external references are cited within the talk. The historical narrative is consistent with known milestones in the field.

Markers derived by PSI from the transcript: the creator did not define chapters.

• 02:00Introduction and acknowledgment of organizers; overview of talk structure
• 07:00Discussion of early pioneers: Marton (1934) and the first electron microscopy of biological samples
• 12:00Connection to Ruska brothers and establishment of the first übet microscopy lab
• 18:00Shift to three-dimensional electron microscopy: Hart and Hoppe's contributions
• 24:00Challenges of sample preparation and the need for vitrification and FIB milling
• 30:00Integration of light microscopy with FIB for targeted milling and correlation
• 36:00Automation of FIB milling using open-source software and machine learning

• Marton (1934) Nature paper on sample preservation — Historical starting point of electron microscopy sample preparation
• Ruska (1942) Bakterien und Viren im Übermikroskop — Early work on biological electron microscopy
• Hart (1968) Polytopic montage — Early proposal for 3D reconstruction from projections
• Hoppe (1983) Review on three-dimensional electron microscopy — Early theoretical framework for tomography
• Villa et al. (2016) HeLa cell lamellae — First successful on-grid lamella preparation
• Engel et al. (2016) Golgi lamella — Application of cryo-ET to organelle structure