[Chimera-users] copyright permission

[M P Williamson]

Hi folks.
I am getting near to the end of writing a book called How Proteins Work (to be
published by Garland, hopefully this fall). I would like to include a figure
showing anisotropic B factors for a protein, and the best image I have come
across is of heme on your website,
http://www.cgl.ucsf.edu/chimera/feature_highlights/ellipsoids.png

I would like to include this image in the book. Could you let me know if there
are copyright restrictions on the image, and how you would like me to refer to
it? 

Thanks
Mike Williamson