This invention pertains to the field of cancer genetics and cytogenetics. Inparticular, this invention pertains to the identification of a novel ampliconon human chromosome 20 which is associated with cancer. More particularly thisinvention pertains to the identification of a novel "amplicon" or genomicnucleic acid in a region of amplification at about 20q13.2 which has beenassociated with a variety of cancers, particularly breast cancer. The novelamplicon of the invention can be used as a probe specific for this region of20q13.2 as well as for the diagnosis and prognosis of various cancers. Alsoprovided are kits for screening for the presence and copy number of the novelamplicon of the invention in a sample containing human nucleic acid.
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