Even though Laminins are not expressed in BCs during their migration [41] (S1A Fig), to completely rule out the possibility that the faster BC migration phenotype observed in tj>LanB1RNAi follicles was due to a possible requirement of this BM component in BCs, we analyzed the effects of expressing a LanB1 RNAi specifically in BCs. The gene discussed is LAMB2; the disease is breast cancer.