1. Single-crystal X-ray structure determination of the two salts support the NMR data. 2. The X-ray structure was the work of Thomas Poulos and coworkers in the late 1970s. 3. For example, PDB files as REMARK465, missing electron densities in X-ray structures ). 4. Values for NMR structures and X-ray structures represent the number of structures in each resolution bin. 5. Its complete stereo structure was determined in 1970 by an X-ray structure of the N-iodoacetyl derivative. 6. Previously published ( and now retracted ) X-ray structures of MsbA were inconsistent with the bacterial homolog Sav1866. 7. Typically, X-ray structures of these molecules show N-C-N bond angles of 101 102? 8. Shown right is an X-ray structure showing a complex between a diaminocarbene and potassium LDA can be especially problematic. 9. X-ray structures have shown N-C-X bond angles of ca . 104 ?and 109 ?respectively. 10. Her dissertation research explored the effects of X-rays on chemical reactions and the X-ray structures of organic compounds.