Thermal denaturation studies (Tm values) of different ODN with complementary DNA or RNA and their half-life evaluations against phosphodiesterase I134.
ODN (5′ → 3′)a | T m with DNAb (°C) | T m with RNAb (°C) | t 1/2 (min) |
---|---|---|---|
d(GCGTTTTTTGCT) | 50 | 45 | — |
d(GCGTTT5′SPTTTGCT) | 48 | 45 | — |
d(GCGTT5′SPT5′SPT5′SPTTGCT) | 44 | 42 | — |
d(TTTTTTTTTT) | — | — | 2 |
d(TTTTTTTTTPST) | — | — | >40 |
d(TTTTTTTTT5′SPT) | — | — | 8 |
d(TTTTTTTTTMeC) | — | — | 7 |
d(TTTTTTTTT5′SPMeC) | — | — | 35 |
PS and 5′SP refer to the phosphorothioate and 5′-SP internucleoside linkages respectively.
ODN not tested.