<div><p>Absorption spectra of products formed upon the reduction of K<sub>2</sub>TeO<sub>3</sub><i>in vitro</i> by <b>(A)</b> 2-mercaptoethanol, <b>(B)</b> a crude extract prepared from <i>S. epidermidis</i> CH cells prior to chromatographic enrichment, and <b>(C)</b> purified bovine liver catalase, were resolved by Induced Coupled Plasma-Optical Emission spectroscopy <a href="http://www.plosone.org/article/info:doi/10.1371/journal.pone.0000070#pone.0000070-Grotti1" target="_blank">[30]</a>.</p>
<p>All products show an absorption maximum at 214.281 nm, the peak wavelength of the Te° standard (triangle in panel A).</p>
<p>We note that the scale used to measure absorbance in the crude extract differs by a factor of ten from those used to measure absorbance in chemically prepared tellurium (A) and in the product of tellurite reduction by bovine liver catalase (C).</p>
<p>This is because the crude extract includes a plethora of components with absorption maxima at or near this wavelength.</p></div
