The Laser photolysis of N-diisopropyl phosphoryl tryptophyl. tyrosine dipeptide methyl ester (N-DiPP-TrpH-TyrOH) has been carried out utilizing a KrF(248 nm) laser. The direct intramolecular ET between TrpH(+) residue...The Laser photolysis of N-diisopropyl phosphoryl tryptophyl. tyrosine dipeptide methyl ester (N-DiPP-TrpH-TyrOH) has been carried out utilizing a KrF(248 nm) laser. The direct intramolecular ET between TrpH(+) residue and TyrOH residue was detected first and the ET between Trp. and TyrOH became dow. It was suggested that phosphoryl group stabilize neighbour radical of aromatic ring by hyperconjugation. In combination with computer modeling we obtained the kinetic parameters of the ET and proved that phosphoryl groups took part in the process of ET. The results should be significant for biological system since every biological process involves the phosphorylations or nonphosphorylation.展开更多
Electron transfer (ET) is an important elementary step of chemical reaction.Phosphorus is the center of energy expression in biological system. As a result, the research on the ET of phosphoryl and nonphosphoryl pepti...Electron transfer (ET) is an important elementary step of chemical reaction.Phosphorus is the center of energy expression in biological system. As a result, the research on the ET of phosphoryl and nonphosphoryl peptides is very important for us to understand the role of phosphorus in life and reveal the secrets of life. In this paper, the ET in some phosphoryl and nonphosphoryl peptides are studied by ESR. It is observed that the electron transfers along the backbone of the peptide and that phosphoryl group takes part in the elementary process in the phosphoryl peptide first.展开更多
文摘The Laser photolysis of N-diisopropyl phosphoryl tryptophyl. tyrosine dipeptide methyl ester (N-DiPP-TrpH-TyrOH) has been carried out utilizing a KrF(248 nm) laser. The direct intramolecular ET between TrpH(+) residue and TyrOH residue was detected first and the ET between Trp. and TyrOH became dow. It was suggested that phosphoryl group stabilize neighbour radical of aromatic ring by hyperconjugation. In combination with computer modeling we obtained the kinetic parameters of the ET and proved that phosphoryl groups took part in the process of ET. The results should be significant for biological system since every biological process involves the phosphorylations or nonphosphorylation.
文摘Electron transfer (ET) is an important elementary step of chemical reaction.Phosphorus is the center of energy expression in biological system. As a result, the research on the ET of phosphoryl and nonphosphoryl peptides is very important for us to understand the role of phosphorus in life and reveal the secrets of life. In this paper, the ET in some phosphoryl and nonphosphoryl peptides are studied by ESR. It is observed that the electron transfers along the backbone of the peptide and that phosphoryl group takes part in the elementary process in the phosphoryl peptide first.
