People has developed some kinds of mimics of oligonucleotides , among them there is Peptide Nucleic Acid(PNA), which was first synthesized by scientists at the University of Copenhagen(Nielsen, Egholm et al).

• 肽核酸是一种寡核苷酸的类似物 ,它是由丹麦哥本哈根大学的Nielsen、Egholm等人首先发明合成的。