Sulfur atoms are also found bound with iron in ferredoxin, one of the components of the electrontransport chain in photosynthesis. 硫原子在铁氧还蛋白可以与铁元素发生联系，该蛋白是光合作用电子传递链中的一个组分。
The element carbon is particularly suited to such a role as it can form stable covalent bonds with other carbon atoms, and with hydrogen, oxygen, nitrogen, and sulfur atoms. 碳元素可以和其他碳原子，氢原子，氧原子，氮原子及硫原子形成稳定的共价键。
