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Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
Structure of intramolecular i-motif formed by 8tC, 14tC, 17tC, and 19tC probes. The positions of the single fluorescent cytosine analog substitutions are numbered and blue circles—cytosines, green circles—guanines, and red circles—adenines.