F-series prostaglandins in <i>C. elegans</i> and mouse tissues.

<p>MRM chromatograms comparing F-series prostaglandins in <i>C. elegans</i> and mouse tissue extracts. The F1 class was detected with mass transition <i>m/z</i> 355/311, the F2 class was detected with mass transition <i>m/z</i> 353/193, and the F3 class was detected with mass transition <i>m/z</i> 351/193. Liquid chromatography retention time (min) is shown on the X-axis and for selected prostaglandin isomers. Cps, counts per second. The <i>C. elegans</i> MRM chromatograms are from <a href="http://www.plosgenetics.org/article/info:doi/10.1371/journal.pgen.1003271#pgen-1003271-g003" target="_blank">Figure 3A</a>. The mouse lung is extremely rich in PGE₂, which was detectable with mass transition <i>m/z</i> 351/193.