Abstract: This invention provides for a cDNA that is a coding region of a previously unknown member of the ETS transcription regulator family. The gene described herein (designated ESX) is located at chromosome 1q32 a region amplified in 50% of early breast cancers. The ESX gene of this invention is associated with the etiology of various cancers including breast cancers. Detection of the ESX gene or gene product is thus of diagnostic and/or prognostic value.

Abstract: The present invention relates to a nucleic acid detection device. The present invention especially relates to a nucleic acid detection device utilizing the novel concept of multiple probes to one target. The device comprises a solid support, on which at least one probe set is attached. The probe set comprises multiple types of oligonucleotide probes, wherein each probe has a unique sequence complementary to the different target nucleic acid. The present invention also relates to a method for detecting nucleic acid. The method involves carrying out a hybridization reaction of the previously described device and a sample in order to determine the nucleic acids present in the sample.