LINKER ELEMENT AND METHOD OF USING SAME TO CONSTRUCT SEQUENCING LIBRARY

Provided is a linker element and a method of using the linker element to construct a sequencing library, wherein the linker element consists of a linker A and a linker B, the linker A is obtained through the complementary pairing of a long nucleic acid strand and a short nucleic acid strand, the 5' end of the long strand has a phosphoric acid modification, and the 3' end of the short strand has an enclosed modification, with enzyme sites in the short strand; and the linker B is a nucleic acid single strand, and the 3' end thereof can be in a complementary pairing with the 5' end of the long strand of the linker A. Using the linker element of the present invention for constructing a sequencing library ensures the linking directionality of the linkers while solving the problems of fragment interlinking, linker self-linking and low linking efficiency, and reducing the purification reaction between steps, shortening the linking time and reducing costs. 提供了种接头元件和使用该接头元件构建测序文库的方法，所述接头元件由接头A和接头B组成；接头A由条核酸长链与条核酸短链互补配