File mouse_ref_mapping.txt

[luisafmc]

Hi, I'm just trying to mapping my RNA reads to mouse genome of reference:
I just want to know where can I found the mouse_ref_mapping.txt or how was there structure to generate something similar. I try to find it in UCSC browser but I without success.

This is the code that I want to run
rsem-prepare-reference --transcript-to-gene-map ref/mouse_ref_mapping.txt
--bowtie2 --bowtie2-path software/bowtie2-2.2.6
ref/myfasta.fa ref/mouse_ref

[Arun-bioinformatics]

I have the same issue.