Several heterochiral dodecadeoxynucleotides (2-6) containing an unnatu
ral L-enantiomer of D-deoxyribose were synthesized and their thermodyn
amic stability for duplex formation was investigated. The results sugg
ested that substitution of L-deoxyribose for natural D-deoxyribose som
ewhat deceases the duplex stability, depending on the site that incorp
orates the L-deoxynucleoside. Copyright (C) 1996 Elsevier Science Ltd