Real-time study of the modification of the peptide bond by atomic calcium.

Authors :: Kummer K
Vyalikh DV
Blüher A
Sivkov V
Maslyuk VV
Bredow T
Mertig I
Mertig M
Molodtsov SL
Source :: The journal of physical chemistry. B [J Phys Chem B] 2011 Mar 17; Vol. 115 (10), pp. 2401-7. Date of Electronic Publication: 2011 Feb 22.
Publication Year :: 2011
Abstract: Strong chemical interaction between bacterial surface protein layers and calcium atoms deposited in situ on top was revealed by means of photoemission spectroscopy. The interaction appears to mainly happen at the oxygen site of the peptide bonds and involves a large charge transfer from Ca 4s states into the peptide backbone. Chemical kinetics of this reaction was characterized using time-dependent valence band photoemission, and the reaction rate constant was determined.<br /> (© 2011 American Chemical Society)