PMID: 16421442

Authors:

Leiros HK, Timmins J, Ravelli RB, McSweeney SM

Title:

Is radiation damage dependent on the dose rate used during macromolecular crystallography data collection?

Journal:

Acta Crystallogr D Biol Crystallogr. 2006 Feb;62(Pt 2):125-32. Epub 2006, Jan 18.

Abstract:

This paper focuses on the radiation-damage effects when applying the same total X-ray dose to protein crystals at different dose rates. These experiments have been performed on both a selenomethionated protein and on bovine trypsin using dose rates that span nearly two orders of magnitude. The results show no clear dose-rate effect on the global indicators of radiation damage, but a small measurable dose-rate effect could be found when studying specific radiation damage. It is hypothesized that this observed dose-rate effect relates to differences in the steady-state free-radical concentration.