Arsenobetaine

Arsenobetaine, an organoarsenical and compatible solute, is discovered in numerous marine animals like lobsters and crabs, and terrestrial organisms such as earthworms and lichens. It protects against B. subtilis cell death caused by high osmolarity or extreme temperatures at 1 mM concentration. Notably, arsenobetaine exhibits non-toxicity to mice with an LD50 of 10 g/kg.