Relative expression of xbp1 and atf6 related to gfp control at 72 hours and 13 days of regeneration during either starving or feeding conditions in cct3A(RNAi) animals. The graph shows that cct3A RNAi down-regulates xbp1 and atf6 specifically during starvation at 72hR. n = 3 replicates (5 planarians each) per time point. 