Upper panel: relation between the galaxy and its projected location within the parent cluster expressed as a fraction of the cluster virial radius R₂₀₀. The color code is the same as in Fig. 1. The larger orange symbols highlight the local galaxies with 2.5 × 10¹⁰  L_⊙ ≤ L_IR ≤ 10¹¹  L_⊙ (see text). Lower panel: the variation of the ratio between the IR and CO luminosities, taken respectively as proxy for star formation activity and cold gas reservoir, as a function of the distance to the cluster center. The error bars on the PdBI measurements are plotted on the y-axes; however, they are often smaller than the symbols. In both panels, the dashed line is the linear regression fit of the relations for the intermediate redshift cluster galaxies and the plain lines are the 95% confidence limits.