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Electron Transfer Across A Peptide-Peptide Interface Within A Designed Metalloprotein, Gennady V. Kozlov, Michael Y. Ogawa
Electron Transfer Across A Peptide-Peptide Interface Within A Designed Metalloprotein, Gennady V. Kozlov, Michael Y. Ogawa
Chemistry Faculty Publications
Mechanistic studies of biological electron-transfer (ET) reactions have involved the use of surface-derivatized proteins, protein−protein complexes, and polypeptide-bridged donor−acceptor compounds. These latter studies seek to use well-defined model systems to better define the role of the intervening protein matrix in mediating biological electron transfers. However, whereas many in vivo ET reactions occur across a noncovalent protein−protein interface, the primary role of the peptide spacers found in current model systems is to provide a covalent link between the donor and acceptor sites. As such, these systems are poorly suited to probe the mechanisms of ET reactions occurring across a peptide−peptide interface.
Rounding Numbers: Why The ''New System'' Doesn't Work, W. Robert Midden
Rounding Numbers: Why The ''New System'' Doesn't Work, W. Robert Midden
Chemistry Faculty Publications
This paper explains a correction to the rounding rule previously publishedin this Journal. The earlier article reported that the best way to roundnumbers is to always round up when the first digit dropped is 5. However,this will lead to accumulation of error when errors are averaged. Arounding strategy that leads to less error is to round up when 5 isfollowed by any nonzero digits, but to round even when 5 is followed byzeros or no other digits. By rounding the last kept digit to an evennumber, half the time the digit is increased and half the time it is keptthe …
Conformations And Relative Stabilities Of The Cis And Trans Isomers In A Series Of Isolated N-Phenylamides, V. P. Manea, K. J. Wilson, John R. Cable
Conformations And Relative Stabilities Of The Cis And Trans Isomers In A Series Of Isolated N-Phenylamides, V. P. Manea, K. J. Wilson, John R. Cable
Chemistry Faculty Publications
The gas-phase conformations of a series of isolated N-phenylamides have been determined from vibrationally resolved electronic spectra obtained by resonant two-photon ionization in a supersonic jet expansion. Both the cis and trans isomers of formanilide were identified, with the cis isomer in 6.5% abundance. The spectral features displayed by this isomer are consistent with a nonplanar geometry which undergoes a large change in the phenyl torsional angle following electronic excitation. The more abundant trans isomer of formanilide adopts a planar structure and is stabilized by 2.5 kcal/mol with respect to the cis isomer. In the excited electronic state the relative …