Spectroscopic characterization of Au complexation and nanoclusters formation on Bacillus sphaericus JG-A12 S-layer

Protein secondary structure and stability of S-layers from B. sphaericus JG-A12 in Au-complexes with Au(III) and in Au(0) nanoparticles, produced by reduction of Au(III), was studied by FTIR spectroscopy.
The data show a different role of side chain carboxylates in complex formation as compared to an analogous study on complexation of Pd(II) or Pt(II).