We have compared the global profiles of 100 tumors in Stage I, II and III with two independently releasedmicroarray datasets in order to understand their transcriptional behaviors accompanying a progression in breastcancer (1, 2). The olfactive receptor, family 56, subfamily A, member 4 OR56A4, was discovered to have beenone of the genes with the most varied expression when comparing initial tumors in stage I, stage II, and stageIII of breast cancer patients. In the stage III tumors, OR56A4 expression in comparison to the stage I tumorswas lower.
High-throughput mapping of the promoters of the mouse olfactory receptor genes reveals a new type of mammalian promoter and provides insight into olfactory receptor gene regulation