Novel peptide nucleic acids and novel linked peptide nucleic acids, form triple stranded structures with nucleic acids. The peptide nucleic acids include ligands such as naturally occurring nucleobases attached to a peptide backbone through a suitable linker. Other nucleobases including C-pyrimidines and iso-pyrimidines can be used as the ligands in Hoogsteen strands to increase binding affinity. Two peptide nucleic acid strands are joined together with a linker to form a bis-peptide nucleic acid. The individual strands of the peptide nucleic acids in the bis compounds can be orientated either parallel or antiparallel to each other.
新型肽核酸和新型连接的肽核酸与核酸形成三股结构。肽核酸包括
配体,例如通过适当的连接剂连接到肽骨架上的天然存在的核碱基。其他核碱基包括C-
嘧啶和异
嘧啶可以用作胡
金氏链中的
配体,以增加结合亲和力。两条肽核酸链通过连接剂连接在一起形成双肽核酸。双肽核酸中肽核酸的各个链可以平行或反平行定向。