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
Description2SOD ribbon colorPencil WhBkgd.png
English: Ribbon diagram of Cu,Zn superoxide dismutase subunit from the first crystal structure (PDB file 2sod). Cu,Zn SOD is a Greek key beta-barrel enzyme that protects against damage from the O-- radical. Active-site copper and zinc are labeled, and disulfide is a yellow zigzag. Hand drawn by Jane Richardson in 1981 and colored with cut-out film on the metals and colored pencils on the ribbons, to match the blue and blue-green colors given to the crystal by the copper site. Photographed and cleaned in 2002; touched up for pure white background in 2012.
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.
https://creativecommons.org/licenses/by/3.0CC BY 3.0 Creative Commons Attribution 3.0 truetrue
Captions
Add a one-line explanation of what this file represents