FileContentRegionsDescription
GTFComprehensive gene annotationCHRIt contains the comprehensive gene annotation on the reference chromosomes only
FastaGenome sequence, primary assembly (GRCm39)PRINucleotide sequence of the GRCm39 primary genome assembly (chromosomes and scaffolds)
The sequence region names are the same as in the GTF/GFF3 files

Reference: https://github.com/alexdobin/STAR/issues/421#issue-324114662