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![[Figure 4]](kw5071fig4mag.jpg)
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Figure 4
Four Q-band EPR spectra (in black) recorded for crystal 3 at 4 K after X-irradiation at 4 K. The first two dose points of 10 and 20 kGy have been scaled by ×5 for clarity. The scan width is 40 mT. The orientation of the crystal was not determined. The simulated spectrum of ![[R{\rm SS(H)}^\bullet]](teximages/kw5071fi5.gif) is shown in blue with the high-g peak explicitly labeled for 20 and 200 kGy dose points. The sharp peak at g ≃ 2.002 becomes apparent at doses above 100 kGy; this is well characterized and is owing to paramagnetic centers trapped in the quartz sample holder. At high field a weak signal is observed in the 10 and 20 kGy spectra (marked by an arrow). This signal is owing to trace amounts of Mn+. |
![[Figure 4]](kw5071fig4.jpg)
 | STRUCTURAL BIOLOGY |
ISSN: 2059-7983
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