Cumulative gas mass vs galactic radius, for the non-AGN configuration, in green, and the AGN one, in blue. Galaxies are ordered by increasing BH mass, from top left to bottom right. The total gas mass is shown as a solid line, and HI gas as a dotted line. The grey area indicates radii below the simulations’ physical softening length, while the vertical line highlights a radius of 5 kpc, to facilitate a comparison with the SFHs in the inner galaxy region shown in Fig. 5.