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ROS or free radical fragmentation of signaling sphingolipids. Chemical structure of some sphingolipids may be changed when they interact with ROS or other free radicals. Free radical-induced fragmentation may occur in 1. sphingosine, 2. CER, and 3. SM under different conditions such as radiation or HOCl stimulation as well as formation of a 2-hexadecenal (Hex). ROS, reactive oxygen species.
