Hydrogenase Active Site Cut-Away

This is a cut-way sectional of the enzyme hydrogenase. Hydrogenase is an important enzyme in biology and in biotechnology applications. Hydrogenase takes protons and electrons and forms hydrogen gas (or performs the reverse reaction), and thus it is capable of converting water into hydrogen gas, in the presence of a reducing agent.
I added four of the iron-sulfur clusters and the actual di-iron active site with all the ligands. This is a nice example of how nature has brought together very intricate clusters and arranged them to make a very nice catalyst. I finished my model and painted the various cofacters (sulfur yellow and iron green), along with some of the secondary structure. Really happy with how this one turned out. I painted the braces with a steel paint to indicate that they are not really part of the structure.