A cDNA, designated LNX1, has been identified by subtractive hybridization o
n the basis that it is expressed in normal human prostate but not in LNCaP
cells. Sequence analysis revealed that it contained two Alu repetitive sequ
ences but no long open reading frame. Hence, it belongs to a class of untra
nslated Alu-containing RNAs. LNX1 is expressed mi most tissues. It is encod
ed by a single copy gene, which is localized on human chromosome 14.