The mouse biliary glycoprotein gene (Bgp): partial nucleotide sequence, expression, and chromosomal assignment.

Transcripts related to the human carcinoembryonic antigen were found in mRNA isolated from both dimethylbenzanthracene-induced and mouse mammary tumor virus-induced mammary tumors. A cDNA library was prepared from a dimethylbenzanthracene-induced tumor, and a clone was isolated by hybridization with a human carcinoembryonic antigen cDNA probe. Its sequence, when compared to those of members of the human carcinoembryonic antigen gene family, was most homologous to the sequence of the human biliary glycoprotein (BGP) gene. Thus, this clone appears to encode a portion of the mouse biliary glycoprotein gene. Southern blot analysis of EcoRI-digested mouse cellular DNA with this probe detected four restriction fragments, all of which appear to be located on mouse chromosome 7, Northern blot analysis using the mouse probe demonstrated that related mRNA species were expressed in some normal adult mouse tissues.