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CAD of hydrolysis products h20−22 (UCC), h13−22 (UGAAG CGUCC), and h7−22 (UACGC GUGAA GCGUC C or ΨACGC GUGAA GCGUC C) from U-sequence (a, c and e) and Ψ-sequence (b, d and f). Laboratory frame collision energy was 18 eV (a and b), 33 eV (c and d), and 48 eV (e and f). Asterisks indicate CAD products from co-isolated hydrolysis products. Ab and Ub stand for nucleobases of adenosine and uridine.
