Contractile fibroblasts form a transient niche for the branching mammary epithelium (unsorted cells)

Single-cell RNA-seq of microdissected regions of pubertal mouse mammary gland, all cell types. The microdissected regions contained either terminal end buds with their surrounding stroma (\"TEB\" sample), or mature ducts with their surrounding stroma (\"duct\" sample). The animals were 5 weeks old females and each sample was pooled from 8 animals.