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

Single-cell RNA-seq of fibroblasts, FACS-sorted from microdissected regions of pubertal mouse mammary gland. 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 11 animals.