This file is from Wikimedia Commons and may be used by other projects.
The description on its file description page there is shown below.
Summary
DescriptionPdb 3on9 and 3ona.png
English: Structure of SECRET protein from Ectromelia virus. The SECRET protein (left) and the SECRET protein bound to CX3CL1 (Right), The chemokine is shown in magenta.
(PDB ID: 3ONA and 3ON9)
to share – to copy, distribute and transmit the work
to remix – to adapt the work
Under the following conditions:
attribution – You must give appropriate credit, provide a link to the license, and indicate if changes were made. You may do so in any reasonable manner, but not in any way that suggests the licensor endorses you or your use.
share alike – If you remix, transform, or build upon the material, you must distribute your contributions under the same or compatible license as the original.