10x documentation is the one he uses:
For the custom genome:
For GFP:
High level steps (based on the 10x tutorial):
- Download the gtf and fasta files for the species of interest;
- Filter gtf with
cellranger mkgtf
command; - Create the fasta file for the additional gene (for example, GFP);
- Create the corresponding gtf file for the additional gene;
- Append fasta file of the additional gene to the end of the fasta file for the genome;
- Append gtf file of the additional gene to the end of the gtf file for the genome;
- Make custom genome with
cellranger mkref
command;