Nucleoside Q is a is a modified 7-deazaguanosine nucleoside located in the anticodon wobble position of four amino acid-specific tRNAs. In bacteria, Nucleoside Q is produced from GTP (G837905) via the 7-deazaguanosine (D201390) precursor. Nucleoside Q and its derivatives usually replace guanosine in the anticodon of tRNAsGUN of eubacteria as well as cytoplasmic and mitochondrial tRNAs of some eukaryotes. Molecular Formula: C17H23N5O7 Molecular Weight: 409.39