Mass fractions at the end of the core C-burning phase of a 17 M_⊙ star for three (or four) nuclear rate references (colour-coded, CF88-N refers to CF88 + neutron channel by Bucher et al. 2015). The grey line refers to the initial abundances, extracted from the CF88 GENEC model at core C-ignition. The bottom panels show the abundances normalised to the ones of the CF88 model. Left: nucleosynthesis using the same (ρ, T) path from CF88 model. Right: nucleosynthesis using the consistent (ρ, T) paths from each GENEC model.