This element has an isotope that forms an eight-atom ring.
This element forms cluster compounds with iron, and those cluster compounds are important to enzymes like coenzyme Q-cytochrome c reductase (CO-EN-zime "Q" SY-toe-krome "C" ree-DUCK-tase). Bonds between two of this element, which form between cysteine (SIS-teen) residues, are critical to protein conformation. This element has an isotope that forms an eight-atom ring. For 10 points, name this element associated with the smell of rotten eggs, with atomic number sixteen.
This element forms cluster compounds with iron, and those cluster compounds are important to enzymes like coenzyme Q-cytochrome c reductase (CO-EN-zime "Q" SY-toe-krome "C" ree-DUCK-tase).
sulfur