Radial abundance gradient of NGC 1058 for the three redshift regimes. Colour coded is each different Z2 region with its corresponding Z0 and Z1 components (same colour). Small circles correspond to Z0, medium sized to Z1 and the bigger ones to Z2. Plus signs represent the abundance determined summing the flux of all the Z0 regions inside the corresponding Z2 region, while crosses are the determination from the total flux of Z1 regions (also the ones inside the Z2 region).