|Section2= |Section3= }} Dimethylsulfoniopropionate ((CH3)2S+CH2CH2COO−; more frequently abbreviated to DMSP),'s a metabolite found in marine phytoplankton, seaweeds and some species of terrestrial and aquatic vascular plants. Older scientific literature refers to it as dimethyl-β-propiothetin. Although originally considered to act only as an osmolyte, several other physiological and environmental roles have also been discovered. DMSP's broken down by marine microbes to form two majo… (More on Dimethylsulfoniopropionate)