Thermal denaturation studies (Tm values) of the chimeric Rp and Sp-AEP/PO-ODN used with complementary single-stranded DNA or RNA and their half-life evaluations against nuclease S1191.
| ODN (5′ → 3′)a | T m with DNA (°C) | T m with RNA (°C) | t 1/2 | RNase-H activation |
|---|---|---|---|---|
| Nuclease S1 | ||||
| d(T13) | 34 | 30 | 4 min | ✓ |
| [d(TAEPTTAEPTTAEP-TTAEPTTAEPTTAEPTT)]-all-Rp | 51 | 35 | >24 h | ✗ |
| [d(TAEPTTAEPTTAEPTTAEPTTAEPTTAEPTT)]-all-Sp | 12 | — | >24 h | ✗ |
AEP refers to a (2-aminomethyl)phosphonate internucleoside linkage.