Evolution of the specific star formation rate in the two first-ranked galaxies in CGs as a function of the CG assembly channel. Left plot: Time evolution of the median sSFR for the ranked galaxies in CGs. The black dashed curve indicates the transition to a quenched state (see text). Right plot: The time evolution of the fraction of CGs with quenched ranked galaxies. For both plots, error bars are computed as in Fig. 3.