A Guanine Ribonucleotide Atypically Adaptive to the Syn Glycosidic Conformation in a Human Telomeric DNA–TERRA RNA Hybrid G-Quadruplex with (3 + 1) Mixed Strand Orientations Studied by NMR - Wenqiang Fu; Wenxuan Hu; Haitao Jing; Tao Wang; Cece Wang; Fengnan Liu; Di Gao; Huiying Yuan; Ruixiang Pang; Na Zhang (Journal of the American Chemical Society, 2026)