mouse strain Rbpjl{tm1(lacZ)Macd} mouse strain A mouse strain in which the targeted gene, Recombination signal binding protein for immunoglobulin kappa J region-like (NCBI Gene ID: 19668), has been modified (allele type: Global Mutation) to Rbpjl{tm1Macd} (MGI ID: Rbpjl{tm1(lacZ)}). This mouse strain has the Rbpjl gene region spanning exons 7, 8, and 9 replaced with lacZ in-frame. A pgk-neo resistance cassette has been removed by Cre-loxP deletion from the founder. Mice heterozygous and homozygous for the lacZ replacement are viable, fertile, of normal size, and do not display any behavioral abnormalities. In mature mice, the pancreas is one-third smaller than normal, due to less acinar tissue. Expression of the lacZ, measured by bet-galactosidase histostaining is very low. Person: Mark A. Magnuson, Jill Lindner, Jean-Philippe Cartailler Rbpjl{tm1(lacZ)Macd} Vanderbilt University Medical Center