Progress in ion detection and clinical diagnosis based on G-quadruplex combined with fluorescence properties

G-quadruplex is a high-level structure composed of folded DNA or RNA rich in tandem repeats of guanine (G). In recent years, G-quadruplex is widely used in various fields due to its unique structural properties. This article briefly introduces the structural properties of G-quadruplex, and provides a brief introduction to the research on DNA and RNA G-quadruplex in various detection and medical fields. It is hoped that this can provide some help to readers who want to understand G-quadruplex.