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Related Concept Videos

Mutations01:35

Mutations

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Mutations are changes in the sequence of DNA. These changes can occur spontaneously or they can be induced by exposure to environmental factors. Mutations can be characterized in a number of different ways: whether and how they alter the amino acid sequence of the protein, whether they occur over a small or large area of DNA, and whether they occur in somatic cells or germline cells.
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All radioactive nuclides emit high-energy particles or electromagnetic waves. When this radiation encounters living cells, it can cause heating, break chemical bonds, or ionize molecules. The most serious biological damage results when these radioactive emissions fragment or ionize molecules. For example, α and β particles emitted from nuclear decay reactions possess much higher energies than ordinary chemical bond energies. When these particles strike and penetrate matter, they...
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Nucleotide Excision Repair01:38

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DNA Distortion and Damage
Cells are regularly exposed to mutagens—factors in the environment that can damage DNA and generate mutations. UV radiation is one of the most common mutagens and is estimated to introduce a significant number of changes in DNA. These include bends or kinks in the structure, which can block DNA replication or transcription. If these errors are not fixed, the damage can cause mutations, which in turn can result in cancer or disease depending on which sequences are...
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Magnetic bacteria exhibit a directed movement called magnetotaxis, driven by structures called magnetosomes. These magnetosomes consist of chains of magnetic particles made of either magnetite (Fe₃O₄) or greigite (Fe₃S₄) and are organized in a linear conformation by a protein scaffold within invaginations of the cell membrane. The bacteria align along the north–south magnetic field lines, much like a compass needle. They are typically microaerophilic or anaerobic...
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Mismatch Repair01:20

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Organisms are capable of detecting and fixing nucleotide mismatches that occur during DNA replication. This sophisticated process requires identifying the new strand and replacing the erroneous bases with correct nucleotides. Mismatch repair is coordinated by many proteins in both prokaryotes and eukaryotes.
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Present and future structural biology activities at DESY and the European XFEL. Erratum.

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Updated: Jan 7, 2026

Application of Laser Micro-irradiation for Examination of Single and Double Strand Break Repair in Mammalian Cells
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Radiation damage and the case for unpatterned fixed targets.

Dominik Oberthür1

  • 1Center for Free-Electron Laser Science CFEL, Deutsches Elektronen-Synchrotron DESY, Notkestr. 85, 22607 Hamburg, Germany.

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|January 2, 2026
PubMed
Summary
This summary is machine-generated.

Serial crystallography advances offer new ways to manage radiation damage at room temperature. Comparing X-ray Free Electron Laser (XFEL) and synchrotron experiments reveals key insights for modern X-ray sources.

Keywords:
SFXSSXdiffract-before-destroyradiation damageserial femtosecond crystallographyserial synchrotron crystallographysheet-on-sheet targets

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Area of Science:

  • Structural biology
  • Crystallography
  • Biophysics

Background:

  • Radiation damage is a major challenge in room-temperature crystallography.
  • Serial crystallography has emerged as a powerful technique to overcome this limitation.

Purpose of the Study:

  • To review recent comparative studies of X-ray Free Electron Laser (XFEL) and synchrotron radiation sources for serial crystallography.
  • To discuss the implications of these findings for the field.

Main Methods:

  • Comparative analysis of experimental data from XFEL and synchrotron sources.
  • Review of recent literature on serial crystallography and radiation damage.

Main Results:

  • XFEL and synchrotron sources present distinct advantages and challenges for serial crystallography.
  • Understanding radiation damage differences is crucial for optimizing experiments at modern X-ray facilities.

Conclusions:

  • Advances in serial crystallography are transforming approaches to radiation damage.
  • The choice of X-ray source significantly impacts experimental design and outcomes in serial crystallography.