Mouse EcoRI satellite DNA contains a sequence homologous to the long terminal repeat of the intracisternal A particle gene.

EcoRI restriction endonuclease fragments from the mouse 1,350-base-pair EcoRI satellite sequence were cloned in pBR322 plasmid. One of these fragments, SAT-1, was hybridized to various restriction fragments from cloned mouse intracisternal type A particle (IAP) genes and to mouse total genomic DNA. Hybridization occurred between the SAT-1 sequence and each of the IAP clones. The common region of hybridization in each of the clones was the long terminal repeat region of the IAP genes.