This target was not in our list of 627 targets because the 75-percentile expression of CTAG1A/CTAG1B in the cancer samples from each TCGA cancer type is less than 5 RPKM (we recognized a peptide as a target for a particular cancer type if the 75-percentile expression of the peptide/gene was greater than 5 RPKM). Here, CTAG1A is linked to cancer.