Fig. 3: L-Cysteine promotes the formation of FeS clusters.
From: Spontaneous assembly of redox-active iron-sulfur clusters at low concentrations of cysteine
a Raw UV-Vis spectrum for solution containing 5 mM L-cysteine, 1 mM FeCl3 and 1 mM Na2S at pH 9. The parameters used to extract the 420 nm peak are also displayed. b the extracted 420 nm peak from the raw data in panel (a). c extracted 420 nm peak from spectra recorded from solutions containing increasing L-cysteine concentrations ranging from 0.1 to 5 mM at pH 9. Each solution was prepared using a 5:1:1 molar ratio of L-cysteine:FeCl3:Na2S. d Plot of the extracted 420 nm peak height as a function of L-cysteine concentration from data in panel (c). These values are compared with the full curve-fitting data used to establish concentrations in Fig. 2c. Source data are provided as a Source data file.
