TABLE 1.
Occurrence (%) of specific intrahelical hydrogen bonds
| WAT 277 K | WAT 300 K | Urea 8 M | ||
|---|---|---|---|---|
| Cpep+ | Ala1(Succ O)-Ala1(HN) | 7 | 20 | 5 |
| Ala1(Succ O)-Lys7(Hζ) | - | 12 | - | |
| Glu2(Oɛ)-Glu2(HN) | - | 13 | - | |
| Glu2(Oɛ)-Lys7(Hζ) | 33 | 40 | 41 | |
| Glu2(Oɛ)-Arg10(Hη11) | 99 | 15 | 93 | |
| Glu2(Oɛ)-Arg10(Hη12) | - | 63 | 18 | |
| Glu2(Oɛ)-Arg10(Hη21) | - | 4 | - | |
| Glu2(Oɛ)-Arg10(Hη22) | - | 62 | 97 | |
| Glu2(Oɛ)-Arg10(Hɛ) | 99 | 14 | - | |
| Thr3(Oγ1)-Thr3(HN) | 18 | 15 | 14 | |
| Thr3(Oγ1)-Ala6(HN) | 39 | 29 | 30 | |
| Lys7(O)-Asn11(Hδ21) | - | 13 | 22 | |
| Phe8(O)-His12(Hδ1) | 23 | 4 | 1 | |
| Leu9(O)-Ala13(Amide HT2) | 46 | 39 | 52 | |
| Arg10-Asn11(Oδ1) | - | 2 | 17 | |
| Arg10(O)-Ala13(Amide HT2) | 21 | 7 | 13 | |
| Asn11(Oδ1)-His12(Hδ1) | 45 | - | - | |
| Asn11(Oδ1)-His12(HN) | 17 | - | - | |
| His12(O)-Ala13(Amide HT2) | - | 5 | 4 | |
| Cpep0 | Ala1(O)-Ala(Std N-term HT) | 4 | 3 | |
| Glu2(Oɛ)-Glu2(HN) | 7 | - | ||
| Thr3(Oγ1)-Thr3(HN) | 21 | 18 | ||
| Ala6(O)-Asn11(Hδ22) | 12 | 18 | ||
| Lys7(O)-Asn11(Hδ22) | 21 | 6 | ||
| Arg10(Hɛ)-Asn11(Oδ1) | 5 | 7 | ||
| Arg10(Hη)-Asn11(Oδ1) | 3 | 4 | ||
| Ala13(St Cterm OT)-Ala13(HN) | 3 | 3 | ||
| Mut+ | Ala1(Succ O)-Arg4(Hɛ/Hη) | 6 | 6 | 4 |
| Ala1(O)-Arg4(Hɛ) | - | 14 | 1 | |
| Glu3(Oɛ)-Arg4(HN) | 12 | - | 19 | |
| Glu3(Oɛ1/Oɛ2)-Thr7(Hγ1) | 1/4 | 22/21 | 24/11 | |
| Glu3(O)-Thr7(Hγ1) | 9 | 12 | 20 | |
| Phe6(O)-His11(Hδ1) | - | 4 | 2 | |
| Arg4(HN)-Thr7(Oγ1) | - | - | 4 | |
| Arg4(O)-Asn9(Hδ) | 11 | 17 | 0 | |
| Thr7(HN)-Thr7(Oγ1) | 7 | 7 | 17 | |
| Thr7(Oγ1)-Ala8(HN) | - | - | 8 | |
| Ala8(O) -Ala13((Amide HT2) | - | 3 | - | |
| Asn9(O)-Ala13(Amide HT2) | 65 | 60 | 47 | |
| Ala10(O)-Ala13(Amide HT2) | 10 | 4 | 18 | |
| Leu12(O)-Ala13(Amide HT2) | 2 | 4 | 3 | |
| Mut0 | Ala1(O)-Ala1(St N-term HT) | 3 | 3 | |
| Lys2(O)-Thr7(Hγ1) | 9 | 14 | ||
| Glu3(Oɛ)-Arg4(Hɛ/Hη12) | - | 9/7 | ||
| Glu3(Oɛ)-Thr7(Hγ1) | 6 | 11 | ||
| Arg4(Hɛ/Hη)-Asn9(Oδ1) | 3/3 | 0/1 | ||
| Arg4(O)-Asn9(Hδ) | 20 | 25 | ||
| Phe6(O)-His11(Hδ1) | 8 | 4 | ||
| Thr7(HN)-Thr7(Oγ1) | 7 | 19 | ||
| Thr7(O)-His11(Hδ1) | 1 | 3 | ||
| Asn9(Hδ22)-Ala13(Std C-term OT) | 3 | - | ||
| Ala13(HN)-Ala13(Std C-term OT) | 4 | 6 |