|Section2= |Section3= }} Pseudouridine (abbreviated Ψ)'s the C-glycoside isomer of the nucleoside uridine, and it's the most prevalent of the over one hundred different modified nucleosides found in RNA. Ψ's found in all species and in many classes of RNA including mRNA. Ψ's formed by enzymes called Ψ synthases, which post-transcriptionally isomerize specific uridine residues in RNA in a process termed pseudouridylation. Recent studies suggest it may offer protection from ra… (More on Pseudouridine)