Fig. 4: CxHyO1S1-subspace.

Elemental compositions in the CxHyO1S1-subspace representing thio acids, colored by the degree of 13C-labelling. Black encircled dots could also be confirmed to consist solely of acetylene building blocks. Differences in hydrogen building blocks are highlighted by black arrows. Horizontal colored lines show the average H/C ratio for the different degrees of labeling. Marker sizes represent relative detected intensity.