ABSTRACT
To illustrate the various techniques, we repeat some of the distance calculations that were done by Watenpaugh and others [WS80] in their study of rubredoxin (PDB identier: 4RXN). Rubredoxin is a metalloprotein containing a single iron atom coordinated by four cysteine sulfur atoms. In this beautiful arrangement, the cysteine residues act like the prong setting of a diamond ring holding the iron atom at the center of a tetrahedral structure (Figure 3.1).
