Since the X-ray structures are averages over many molecules, it is, however, not possible to deduce the actual occupancies directly from such a structure.
They probably also assume a direct role in photosynthesis, as they have been found in the X-ray structures of photosynthetic complexes.
The X-ray structure was the work of Thomas Poulos and coworkers in the late 1970s.
X-ray structures of DPP-4 that have been published since 2003 give rather detailed information about the structural characteristics of the binding site.
The X-ray structure of epinine hydrobromide has been reported.
The X-ray structure of the catalyst showed a stereodefined environment.
An X-ray structure of this molecule has not been obtained and at the time of publication some doubt remained as to their exact carbenic nature.
X-ray structures have show N-C-X bond angles of ca. 104 and 109 respectively.
The X-ray structure for synephrine has been determined.
However, there is still no high-resolution X-ray structure of F-actin.