Baryonic j_bar − M_bar − f_gas plane for our original sample (circles) and a set of extreme galaxies (see text). Top left panel: relation for all the galaxies, while the remaining panels show the galaxies in bins of f_gas (given in the top left corner of each panel). First panel, the lines of constant f_gas are as in Fig. 1. In the remaining panels, the coloured areas enclose the region delimited by the whole f_gas bin. We remark that the coloured lines of our plane are derived by fitting only our data. The rest of the galaxies closely follow our fit.