mouse strain Nkx6-1{tm2(flox)Msan} mouse strain A mouse strain in which the targeted gene, Nk6 Homeobox 1 (NCBI Gene ID: 18096), has been modified (allele type: Conditional Null) to targeted mutation 1.1 (MGI ID: Nkx6.1{tm1.1Msan}). A conditional allele for nkx6.1 is necessary to study the function of Nkx6.1 in adult mice. A homozygous nkx6.1 null allele results in neonatal lethality due to a paralytic state, which is a direct result of Nkx6.1 function in the development of motor neurons. Conditional loss of Nkx6.1 is achieved through Cre mediated recombination of a floxed exon II of nkx6.1. Our use for a conditional nkx6.1 allele is to study its function in beta cells of the adult pancreas. Nkx6-1{tm2(flox)Msan} Person: Mark A. Magnuson, Jill Lindner, Jean-Philippe Cartailler Vanderbilt University Medical Center