library_construction_protocol: RNA was extracted from the skin of mice using the Qiagen mRNA extraction kit, per the manufacturer's instructions. Libraries were prepared using the TruSeq Stranded mRNA Library Prep Kit (Illumina Cat# 20020594), TruSeq RNA Single Indexes Set A (Illumina Cat# 20020492) and Set B (Illumina Cat # 20020493) per the manufacturer's instructions.