I am working with Salmon to quantify gene expression from single-cell RNA-seq data. I used NCBI transcriptome (in FASTA format; https://ftp.ncbi.nlm.nih.gov/genomes/all/GCF/000/001/635/GCF_000001635.26_GRCm38.p6/GCF_000001635.26_GRCm38.p6_rna.fna.gz) as index, and my quantification went pretty well. The output gave me TPM values for each transcript. For example, for a gene with three transcripts, I end up with three different quantifications, one for each transcript. Since I want to have a gene-specific quantification, is it fair to sum up the TPM values of the three transcripts to obtain one single quantification relative to that gene? Thank you in advance!