The interactions between several peptides with low molecular weight (guest, NH2 Arg Arg Trp Trp H 2; NH2 Arg Trp Arg Trp H 3; NH2 Trp Arg Arg Trp H 4; NH2 Arg Arg Trp Trp Trp Trp H 5; NH2 Trp Trp Arg Arg Trp Trp H 6; ...The interactions between several peptides with low molecular weight (guest, NH2 Arg Arg Trp Trp H 2; NH2 Arg Trp Arg Trp H 3; NH2 Trp Arg Arg Trp H 4; NH2 Arg Arg Trp Trp Trp Trp H 5; NH2 Trp Trp Arg Arg Trp Trp H 6; NH2 Arg Arg Trp Trp Trp Trp Trp Trp H 7; NH2 Arg Arg Trp Trp Trp Trp Trp Trp Trp Trp H 8) and β cyclodextrin dimer (host, 1) bridged with the derivative of (1R, 3R) 1 aminocyclobutane cis 1,3 dicar boxylic acid were investigated by using fluorescence polarization method in buffer aqueous solution (pH 7.4) at 298K. The binding constants of the cyclodextrin dimer 1 to the guests 2 8 were determined. It was shown that there was a cooperative action of the two cavities of a cyclodextrin dimer in the binding of large substrates, and that the structure and properties of amino acid in the peptides played very important roles in the synergic complexation between host and guest.展开更多
The inclusion interactions between flavonoids and β cyclodextrin( β CD) and its derivatives have been studied by a phase solubility method. The phase solubility graphs showed that the 1∶1 inclusion compounds were f...The inclusion interactions between flavonoids and β cyclodextrin( β CD) and its derivatives have been studied by a phase solubility method. The phase solubility graphs showed that the 1∶1 inclusion compounds were formed beween β CD and rutin, qucertin and morin respectively. The compounds appeared to be a type of A L inclusion. β CD derivatives have stronger binding capacity than β CD. The enhanced solubility of compounds decreased in the order methyl β CD>hydroxypropyl β CD> β CD. The highest solubility was obtained in methyl β CD inclusion complex with qucertin in level of 50 times than that in water.展开更多
文摘The interactions between several peptides with low molecular weight (guest, NH2 Arg Arg Trp Trp H 2; NH2 Arg Trp Arg Trp H 3; NH2 Trp Arg Arg Trp H 4; NH2 Arg Arg Trp Trp Trp Trp H 5; NH2 Trp Trp Arg Arg Trp Trp H 6; NH2 Arg Arg Trp Trp Trp Trp Trp Trp H 7; NH2 Arg Arg Trp Trp Trp Trp Trp Trp Trp Trp H 8) and β cyclodextrin dimer (host, 1) bridged with the derivative of (1R, 3R) 1 aminocyclobutane cis 1,3 dicar boxylic acid were investigated by using fluorescence polarization method in buffer aqueous solution (pH 7.4) at 298K. The binding constants of the cyclodextrin dimer 1 to the guests 2 8 were determined. It was shown that there was a cooperative action of the two cavities of a cyclodextrin dimer in the binding of large substrates, and that the structure and properties of amino acid in the peptides played very important roles in the synergic complexation between host and guest.
文摘The inclusion interactions between flavonoids and β cyclodextrin( β CD) and its derivatives have been studied by a phase solubility method. The phase solubility graphs showed that the 1∶1 inclusion compounds were formed beween β CD and rutin, qucertin and morin respectively. The compounds appeared to be a type of A L inclusion. β CD derivatives have stronger binding capacity than β CD. The enhanced solubility of compounds decreased in the order methyl β CD>hydroxypropyl β CD> β CD. The highest solubility was obtained in methyl β CD inclusion complex with qucertin in level of 50 times than that in water.
