Across TCGA pan-cancer cohorts, OR1I1 mass-spec protein differs between tumor and matched normal tissue in 1 of 18 cancer types tested, making tumor–normal expression one of OR1I1’s most consistent transcriptional readouts.
The strongest signal is observed in head and neck squamous cell carcinoma (HNSC), where OR1I1 mass-spec protein is more highly expressed in tumor relative to normal tissue. In most cancer types OR1I1 is over-expressed in tumor.
HNSC are the cancer types where OR1I1 tumor–normal differential expression is most reproducible.