Multi-transition spectra of CO[2–1] (top), CO[3–2] (middle) and CO[5–4] (bottom), for each galaxy in our sample extracted by fitting circular Gaussian models convolved with the beam at the position of the galaxies in steps of 25 km s^-1. The CO[2–1] data are taken from D10, the CO[3–2] data for BzK-21000 from Dannerbauer et al. (2009). The shaded regions correspond to the velocity range (kept fixed for all transitions of a given galaxy), over which fluxes are measured. Continuum levels as measured in the data and constrained from our multiwavelength modeling have been subtracted. Zero velocity corresponds to the accurate CO[2–1] redshifts from D10.