Subject area	Biology
More specific subject area	NGS, Transcriptomics, Cancer biology
Type of data	Transcriptome data
How data was acquired	High-throughput sequencing using Illumina HiSeq2500
Data format	Raw (fastq)
Experimental factors	Breast cancer (invasive ductal carcinoma; luminal B subtype) and adjacent normal tissues
Experimental features	Poly(A) RNA was purified from 1 g total RNA from each sample, and cDNA was synthesized using SuperScript II (Invitrogen). Sequencing libraries were prepared using the TruSeq RNA Library preparation kit (Illumina)
Data source location	Seoul, Republic of Korea
Data accessibility	Raw data can be accessed at NCBI SRA (BioProject ID: PRJNA432903) (https://www.ncbi.nlm.nih.gov/bioproject/PRJNA432903).