.Publisheru00e2 $ s note Springer Attribute stays neutral with regard to administrative insurance claims in published maps and institutional affiliations.This is a summary of: Bhat-Nakshatri, P. et al. Single-nucleus chromatin availability as well as transcriptomic map of breast tissues of ladies of varied genetic ancestral roots. Nat. Med. https://doi.org/10.1038/s41591-024-03011-9 (2024 ).