Abundance profiles of the propargyl radical C₃H₃ and propene C₃H₆ obtained after 900 runs. Thick black solid line: initial profile. Black dotted line: median profile obtained from the uncertainty propagation study. Black dashed-dotted lines: 5th and 15th 20-quantiles of the distribution. Black long-dashed lines: 1st and 19th 20-quantiles of the distribution. The red open triangle refers to Cassini/INMS observations from Magee et al. (2009).