Pseudothymidine is a C-nucleoside analog of thymidine. In Vitro Pseudothymidine is a C-nucleoside analog of thymidine. The calculated ΔΔG° 50 /mod is -0.5 kcal/mol, with a Δ T m /mod of 0.82°C. For the duplexes containing nine dA-T/ψT pairs, the Δ T m /mod is -0.9°C and a ΔΔG° 50 /mod is +1.1 kcal/mol. The modification of the duplex containing 12 consecutive dA-T/ψT base pairs produces a Δ T m /mod of -0.9°C and a ΔΔG° 50 /mod of +1.2 kcal/mol. MCE has not independently confirmed the accuracy of these methods. They are for reference only. Form:Solid