Evidence map›Paper›PMID 34873060›Full record

ArticleProceedings of the National Academy of Sciences of the United States of America2021

Benchmarking the ideal sample thickness in cryo-EM.

Michael W Martynowycz, Max T B Clabbers, Johan Unge, Johan Hattne, Tamir Gonen

Abstract read
In one paragraph

Article in Proceedings of the National Academy of Sciences of the United States of America, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 43 papers.

0numbers the graph read from it
0cells of the map it votes in
43citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

43 citing papers in PubMed.

  1. Review
  2. Electrons and X-rays for diffraction and imaging.Acta crystallographica. Section D, Structural biology · 2026
    Review
  3. Article
  4. Article
  5. Article
  6. Article
  7. Standards for MicroED.Acta crystallographica. Section C, Structural chemistry · 2025
    Article
  8. Article
  9. Review
  10. Review
  11. Article
  12. Unraveling atomic complexity from frozen samples.Structural dynamics (Melville, N.Y.) · 2025
    Article
  13. Article
  14. Article
  15. Article
  16. Article
  17. An Updated Structure of Oxybutynin Hydrochloride.Advanced science (Weinheim, Baden-Wurttemberg, Germany) · 2024
    Article
  18. Article
  19. Article
  20. Cryo-electron tomography pipeline for plasma membranes.bioRxiv : the preprint server for biology · 2024
    Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

5 authors.

Michael W MartynowyczHHMI, University of California, Los Angeles, CA 90095.
Max T B ClabbersDepartment of Biological Chemistry, University of California, Los Angeles, CA 90095.ORCID 0000-0002-5466-6508
Johan UngeDepartment of Biological Chemistry, University of California, Los Angeles, CA 90095.ORCID 0000-0002-1077-8137
Johan HattneHHMI, University of California, Los Angeles, CA 90095.ORCID 0000-0002-8936-0912
Tamir GonenHHMI, University of California, Los Angeles, CA 90095; tgonen@g.ucla.edu.ORCID 0000-0002-9254-4069

Funding

TRD4: Design and Engineering of MicroED hardware for nanocrystallization and time resolved studiesP41GM136508 · NIGMS · UNIVERSITY OF CALIFORNIA LOS ANGELES · PI GONEN, TAMIR · 2020 to 2024
$7.6M
NIGMS NIH HHS P41 GM136508
6 · The paper itself

Abstract

The relationship between sample thickness and quality of data obtained is investigated by microcrystal electron diffraction (MicroED). Several electron microscopy (EM) grids containing proteinase K microcrystals of similar sizes from the same crystallization batch were prepared. Each grid was transferred into a focused ion beam and a scanning electron microscope in which the crystals were then systematically thinned into lamellae between 95- and 1,650-nm thick. MicroED data were collected at either 120-, 200-, or 300-kV accelerating voltages. Lamellae thicknesses were expressed in multiples of the corresponding inelastic mean free path to allow the results from different acceleration voltages to be compared. The quality of the data and subsequently determined structures were assessed using standard crystallographic measures. Structures were reliably determined with similar quality from crystalline lamellae up to twice the inelastic mean free path. Lower resolution diffraction was observed at three times the mean free path for all three accelerating voltages, but the data quality was insufficient to yield structures. Finally, no coherent diffraction was observed from lamellae thicker than four times the calculated inelastic mean free path. This study benchmarks the ideal specimen thickness with implications for all cryo-EM methods.

Indexed as

AnimalsBenchmarkingCryoelectron MicroscopyCrystallizationCrystallographyElectronsHumansMicroscopy, Electron, ScanningMicroscopy, Electron, TransmissionModels, MolecularSpecimen HandlingCryo-EMelectron scatteringFIB millingmean free pathMicroED

Identifiers

PMID34873060
PMCPMC8670461

What OpenQuestion holds

Textmetadata
LicenceCC BY-NC-ND
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.