Figure 4
From: The competing mini-dumbbell mechanism: new insights into CCTG repeat expansion
The unusually downfield or upfield 31P signals of T14 and T15 in (TTTA)5, T18 and T19 in (TTTA)6, T22 and T23 in (TTTA)7, and T26 and T27 in (TTTA)8 suggest a mini-loop appears at the penultimate repeat of these sequences. The mini-loop is resulting from fast exchange between two competing MDBs formed in the last three repeats. The 31P spectra shown here were acquired at 25 °C.
