mammalian cells

Chemists report detecting a crown-shaped ring made of sulfur atoms inside mammalian cells, a structure long theorised but rarely observed in living systems. The finding, covered by Chemical & Engineering News, could reshape understanding of sulfur chemistry in biology, since reactive sulfur species are involved in cell signalling and metabolism. Researchers say confirming such unusual sulfur rings in cells opens new questions about how they form and what roles they play in health and disease.