Charge transfer in peptides. Pulse radiolysis investigation of one-electron reactions in dipeptides of tryptophan and tyrosine.
@article{Prtz1979ChargeTI,
title={Charge transfer in peptides. Pulse radiolysis investigation of one-electron reactions in dipeptides of tryptophan and tyrosine.},
author={W. Pr{\"u}tz and E. Land},
journal={International journal of radiation biology and related studies in physics, chemistry, and medicine},
year={1979},
volume={36 5},
pages={
513-20
}
}One-electron oxidation of TyrOH-TrpH or TrpH-TyrOH in aqueous solutions by N3 radicals occurs predominantly at the tryptophyl residue. The corresponding indolyl radicals (absorbing at 510 nm) are subsequently transformed into phenoxyl radicals (absorbing at 390/405 nm): TyrOH-Trp leads to TyrO-TrpH, k5 = 5.4 x 10(4)s-1, (5), Trp-TyrOH leads to TrpH-TyrO, k7 = 7.3 x 10(4)s-1. (7) The first-order radical transformation rates are independent of the (initial) concentration of N3 or peptide and… CONTINUE READING
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