This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
AlphaAmanitinRNA polymerase II complex K. Ribbon diagram of Saccharomyces cerevisiae RNA polymerase II in complex with amanitin red Active site magnesium ion visible in pink near center Created using PyMOL sourceforge net and GIMP Style and orientation made to match pnas org jpeg Legend lightblue RNA polymerase II magenta Active