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  _  __     ___      ______   __   __   _    _   
 | |/ //   / _ \\   /_   _//  \ \\/ // | |  | || 
 | ' //   | / \ ||    | ||     \ ` //  | |/\| || 
 | . \\   | \_/ ||   _| ||      | ||   |  /\  || 
 |_|\_\\   \___//   /__//       |_||   |_// \_|| 
 `-` --`   `---`    `--`        `-`'   `-`   `-`

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Text this: Guanine base stacking in G-quadruplex nucleic acids