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. 2014 Jun 30;42(15):e117. doi: 10.1093/nar/gku553

Figure 3.

Figure 3.

Molecular weight determined by MS. (A) ESI-MS spectra of wild-type RNA (top) and of the spin-labeled RNA after MaxEnt deconvolution showing a first approximate of the masses. Exact masses were next calculated manually from the multiply charged species (Table 1). (B) MSMS spectrum of the spin-labeled RNA after RNaseA treatment. The fragment 5′-A23G24SLG25A26C27 p-3′ whose parent mass is 1884.1 Da, contains the thio-modified G bearing the nitroxide modification. Possible fragmentations are indicated by w, x, y and z series.