Average normalized radial distributions (I_norm(r)) of “cold” molecular gas derived from CO out to r = 210 pc for the seven L_X bins defined in Sect. 4.1. We also show the I_norm(r) profile representative of the nonAGN galaxy subset. Bins 1–4 and 5–7 correspond to the AGN feedback and build-up branches, respectively. Histograms and error bars for each bin represent the median and the median absolute deviation values derived from the distribution of normalized individual galaxy profiles sampled with a radial binning Δr = 20 pc. The red-shaded areas illustrate the uncertainties around the median values. The median value of the concentration index of molecular gas and its associated uncertainty are shown in each panel. The common scales adopted for all bins in the x and y axes are shown in the lower left panel.