Left: CO(2–1) effective radius as a function of class. Type 0 (R), 0 (P), 1, and 2 are shown in blue, magenta, green, and red, respectively. The median R_CO values (horizontal lines) are shown for each class. Empty squares identify galaxies containing an AGN. Middle:R_CO distribution for the whole sample (gray solid line) and for the individual subgroups (same color code as in the left panel). The colored vertical lines in the upper part of the panel represent the median values of each distribution, following the same color code. Right:R_CO distribution for the whole sample (gray solid line) and for LIRGs with an AGN.