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. 2001 Oct 15;29(20):4231–4237. doi: 10.1093/nar/29.20.4231

Table 1. Imino proton exchange rates (s–1) at 1°C: GTA triplex (upper row) and C+GC triplex (lower row).

T24 C+25 T26 G27/C+27 T28 C+29 T30 T31
4.0 ± 0.4 7.6 ± 0.6 10–3 <kex <0.5 4.2 ± 0.2 (3 ± 1) × 10–4 11.6 ± 0.3 10–3 <kex <0.5 11.2 ± 0.4
a
12 ± 1
(3.8 ± 0.7) × 10–5
0.7 ± 0.4
(3.3 + 0.3) × 10–5
1.5 ± 0.3
10–3 <kex <0.5
10.5 ± 0.6
A1 G2b A3 T4/G4b A5 G6b A7 A8
  (9 ± 2) × 10–4   (2.6 ± 0.8) × 10–4   (9 ± 2) × 10–4    
 
(9.9 ± 0.3) × 10–5
 
(9.9 ± 0.3) × 10–5
 
(9.9 ± 0.3) × 10–5
 
 
T20 C13 T18c A17/C17 T16 C15 T14c T13
1.8 ± 0.2   10–3 <kex <0.5   (4.0 ± 1.0) × 10–4   10–3 <kex <0.5 1.1 ± 0.2
1.7 ± 0.2   (3.0 ± 0.3) × 10–4   (4.7 ± 0.3) × 10–5   10–3 <kex <0.5 1.1 ± 0.1

aThe imino proton resonance of T24 in the C+GC triplex is not observable (see text).

bIn the GTA triplex the imino proton resonance of G2 and G6 overlap (Fig. 2); similarly, in the C+GC triplex, the imino proton resonance of G2, G4 and G6 overlap (Fig. 2). The values of kex given were obtained from the overlapped resonances.

cIn the GTA triplex the imino proton resonance of T18 and T14 overlap (Fig. 2).