Gene expression was compared in a metastatic (VMR-Liv) neoplastic cell
line and a related nonmetastatic (VMR-O) neoplastic cell line by mean
s of the differential display method. A fragment of cDNA corresponding
to the tag7 gene, differentially expressed in the metastatic cell lin
e, was isolated. The full-length tag7 cDNA was cloned and its nucleoti
de sequence was determined. No homology between the tag7 gene and know
n sequences was revealed. tag7 gene transcription was studied in some
tumors, cell lines, and normal mouse organs.