The present invention relates to a process for preparing arrays of oligopeptide nucleic acid probes immobilized on a solid matrix by employing polymeric photoacid generator. Arrays of peptide nucleic acid probes of the invention are prepared by the steps of: (i) derivatizing the surface of a solid matrix with aminoalkyloxysilane in alcohol and attaching a linker with acid-labile protecting group on the solid matrix; (ii) coating the solid matrix with polymeric photoacid generator (PAG); (iii) exposing the solid matrix thus coated to light to generate acid for eliminating acid-labile protecting group; (iv) washing the solid matrix with alkaline solution or organic solvent and removing residual polymeric photoacid generator; and, (v) attaching a monomeric peptide nucleic acid with acid-labile protecting group to the solid matrix, and repeating the previous Steps of (ii) to (v). In accordance with the present invention, neutral peptide nucleic acid probes, as the promising substitute for conventional negatively-charged oligonucleotide probes, can be prepared by employing polymeric photoacid generator in a simple and efficient manner, while overcoming the problems confronted in the prior art DNA chip fabrication using PR system and PPA system.
                            本发明涉及一种利用聚合物光酸发生剂在固体基质上制备寡肽核酸探针阵列的方法。本发明的肽核酸探针阵列的制备步骤包括:(i)用醇中的
氨基烷氧基
硅烷对固体基质表面进行衍生化,并在固体基质上连接一个带有酸敏感保护基的连接剂;(ii)涂覆固体基质与聚合物光酸发生剂(PAG);(iii)将涂有聚合物光酸发生剂的固体基质暴露在光下以生成酸,以消除酸敏感保护基;(iv)用碱性溶液或有机溶剂洗涤固体基质,并去除残留的聚合物光酸发生剂;(v)将带有酸敏感保护基的单体肽核酸连接到固体基质上,并重复前述步骤(ii)至(v)。根据本发明,中性肽核酸探针作为传统带负电寡核苷酸探针的有望替代品,可以通过简单高效地利用聚合物光酸发生剂制备,同时克服了先前使用PR系统和
PPA系统制备DNA芯片时所面临的问题。