Supramolecular hydrogels based on short peptides linked with conformational switch

Yucheng Huang, Zhenjun Qiu, Yanmei Xu, Junfeng Shi, Hongkun Lin, Yan Zhang
2011 Organic and biomolecular chemistry  
Content Figure 2 UV absorption of the hydrogels formed by A) Azo-Lys-Phe-Ala B) Azo-Gly-Phe-Ala C) Azo-Leu-Phe-Ala D) Azo-Glu-Phe-Ala E) Azo-Lys-D-Phe-D-Ala before (black solid line) and after (red dash) photo-irradiation Azo-Lys-Phe-Ala Azo-Gly-Phe-Ala Azo-Leu-Phe-Ala Azo-Glu-Phe-Ala A B C D Azo-Lys-D-Phe-D-Ala F 13.9 Hz), 1.30(d, 3H, J=7.4 Hz); ESI-MS: calc.(M)=515.22, find ( M-1)=514.50. Azo-Lys-Phe-Ala: 1 H NMR (300 M, DMSO-d 6 ) δ(ppm): 8.28(d, 2H, J=7.1 Hz), 7.99(d, 1H, J=8.0 Hz),
more » ... 2H, J=1.7, 8.0 Hz), 7.83(d, 2H, J=7.6 Hz), 7,73(br, 2H), 7.56-7.64(m, 3H), 7.47(d, 2H, J=7.4 Hz), 7.17-7.24(m, 5H), 4.52-4.59(m, 1H), 4.18-4.27(m, 2H), 3.58(dd, 2H, J=14.2, 18.8 Hz), 3.07(dd, 1H, J=4.1, 13.9 Hz) , 2.80(dd, 1H, J=9.7, 13.9 Hz), 2.70-2.76(m, 2H), 1.40-1.62(m, 4H), 1.28(d, 3H, J=7.5 Hz), 1.16-1.29(m, 2H); ESI-MS: calc.(M)=586.29, find ( M+1)=587.25. Azo-VYGGG(ESI-MS): calc.(M)= 673.72, find ( M-1)=672.58; Azo-GAGAS(ESI-MS): calc.(M)= 583.59, find ( M-1)=582.67; Azo-SDKP(ESI-MS): calc.(M)=667.71, find ( M-1)=666.50; Azo-VPP(ESI-MS): calc.(M)=533.62, find ( M-1)=532.67; Azo-YIGSR(ESI-MS): calc.(M)=816.90, find ( M+1)=817.42; Azo-IKVAV(ESI-MS): calc.(M)=750.93, find ( M+1)=751.75; 9 Azo-RGD (ESI-MS): calc.(M)=568.58, find ( M+1)=569.42; Azo-LGAGGAG (ESI-MS): calc.(M)=723.78, find ( M+Na)=746.50; Azo-VVPQ (ESI-MS): calc.(M)=663.76, find ( M+1)=664.33; Azo-YSV (ESI-MS): calc.(M)=589.64, find ( M+1)=590.17;
doi:10.1039/c0ob01057j pmid:21298187 fatcat:p7wyko45bvb2zj2ls2n5j4a32u