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Fig. 6

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13C/12C ratios of different organic molecules measured in different comets, carbonaceous chondrites (CC) and interplanetary dust particles (IDP) compared to the terrestrial value (green line, Lyons et al. 2018), the Sun (brown line, Lyons et al. 2018) and the ISM (purple line, Wilson 1999). For C2 and CN, data from 4 and 19 comets, respectively, have been considered. Full references are given in Table B.2.

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