NGC 4388. From top to bottom: CO(2-1) integrated intensity contours overlaid on the I − H color map, CO(2-1) observed mean velocity field, velocity model, residual velocity map (observed-model), and CO(2-1) observed velocity dispersion map. The white star shows the adopted AGN position. The rest is as in Fig. 2. Contours: CO(2-1) integrated intensity contours are the same as in Fig. 1. Velocity contours (b and c panels) are from 2335 to 2700 km s⁻¹ in steps of 20 km s⁻¹. Residual velocity contours are from −200 to 200 km s⁻¹ in steps of 30 km s⁻¹. Velocity dispersion contours are in steps of 30 km s⁻¹, starting at 30 km s⁻¹.