CO spectra of the target galaxies within an aperture containing the totality of CO emission regions plotted against velocity, where V_sys is given in Table 2. The full-width at zero intensity (FWZI) corresponds to the vertical dotted lines (see Table 2, Col. (2)). The 12-m spectra are shown in blue, and the ACA in red. In NGC 5253, these are both continuum-subtracted spectra. More details are given in the text.