Mass-metallicity relations constructed with the SF galaxies of the sample compared with the local Universe MZR from Tremonti et al. (2004). The left panel shows the foreground MZR (fMZR) with blue dots and background MZR (bMZR) with red dots. Lines correspond to linear fits. The shaded area corresponds to the 1σ scatter for the fMZR and bMZR. Right panel: MZR with the SF members of AC114 (cMZR). The black line and shaded area are the linear fit and the respective 1σ scatter. The dashed blue and red lines are the fMZR and bMZR linear fits. The open circles (left) and open circles (right) show galaxies whose stellar mass was estimated using synthetic photometry.