Nurture-free main sequence defined for isolated SF galaxies with 8.5 ≤ log(M_⋆/M_⊙) ≤ 11.5. In addition, we represent the location of isolated SF galaxies in the diagram (red points). For comparison, we also show the relation for SF galaxies in Duarte Puertas et al. (2017) and the control sample (black continuous line and black dashed line, respectively), with grey points showing the values for SF galaxies in the DP17 sample. In the lower right corner we present a representative error, given by the median value of the error of the log SFR (multiplied by 10 for better visualisation) for each sample following the colours in the legends, and the median error of the log M_⋆ for galaxies in the comparison sample from the MPA catalogue, which is in agreement with the error we consider for galaxies in the SIG, SIP, and SIT samples (log (M_⋆/M_⊙) = 0.10 dex). The lower panel show the average difference with the Main Sequence in Duarte Puertas et al. (2017).