BCL2L1 and breast neoplasm: Regarding the expression of anti-apoptotic genes (pro-apoptotic ones are evoked below), this evaluation revealed a statistically significant enrichment (that is, a statistically significant higher expression), in HER2 overexpressing breast tumors compared to other breast tumors, in one MCL1 specific probe and also in one BCL2L1 (Bcl-xL) one (Table 1).