This is an image of leukemia inhibitory factor (LIF). I accessed the data from the Protein Data Bank data (PDB: 1LKI) and rendered it in Pymol.

The PDB page states that it is the house mouse (Mus musculus) protein.

For the original data, please see: Robinson, R.C., Grey, L.M., Staunton, D., Vankelecom, H., Vernallis, A.B., Moreau, J.F., Stuart, D.I., Heath, J.K., Jones, E.Y. The crystal structure and biological function of leukemia inhibitory factor: implications for receptor binding. Cell v77 pp.1101-1116, 1994.

DescriptionLIF Crystal Structure.rsh.png	Crystal structure of Leukemia Inhibitory Factor from mouse as published in the Protein Data Bank (PDB: 1LKI)
Date	14 February 2007
Source	Created from PDB 1LKI and rendered by me using Pymol
Author	Ramin Herati
Permission (Reusing this file)	Public domainPublic domainfalsefalse I, the copyright holder of this work, release this work into the public domain. This applies worldwide. In some countries this may not be legally possible; if so: I grant anyone the right to use this work for any purpose, without any conditions, unless such conditions are required by law.