Running mean as a function of radius of the azimuthally-averaged metallicity (left panel) and age (right panel) for the sample galaxies in the core-NS clump (orange symbols) and for those infalling in the Fornax cluster (green symbols). The dash-dotted lines represent the fits to the metallicity gradients between transition radii. The dash-dotted lines represent the fits to the metallicity gradients in the two regions defined by transition radii R_tr, 1 and R_tr, 2. The error bars trace the dispersion of the points around the mean trend. The radial profiles of the stellar kinematics and population properties of the three edge-on galaxies, FCC 153, FCC 170, and FCC 177, have been excluded from the mean.