O

Ribothymidine (T)

4-Thiouridine (s4U)

Ribothymidine (T)

Figure 3.2. Modified uridine derivatives widely occurring in tRNAs. The full list of modified nucleosides in tRNAs and their formulas can be found in: P.A.Limbach, P.F.Crain & J.A.McCloskey (1995) "tRNA: Structure, Biosynthesis, and Function" (D.Soll & U.L.RajBhandary, eds.), ASM Press, Washington, D.C., p.p. 551-555.

Methoxyuridine (mo5U)

OCH2—COOH

OCH2—COOH

Methoxyuridine (mo5U)

5-Carboxymethoxyuridine (cmo5U or V)

0 0

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