MCF7 is a well-characterized human breast cancer cell line widely used in cancer research. It is an epithelial cell line that exhibits hormone-dependent growth and is commonly used to study breast cancer biology, drug response, and hormone signaling pathways., These vials contain 10^6 viable MCF7 cells, sourced from ATCC (American Type Culture Collection). The cells are cryopreserved for long-term storage and should be thawed according to standard cell culture protocols. Passage numbers are indicated for each vial to track cell line age.