The 1993 mouse Chromosome 13 report includes 71 new loci that have been placed on Chr 13 (Table 1), increasing the number of markers on Chr 13 to 146. The new loci have been incorporated into the consensus genetic map shown in Fig. 1. As in previous years, gene order that was determined by examining the map locations of markers in individual crosses was given a priority when creating the map (Justice, M.J., Stephenson, D.A. 1991Stephenson, D.A. , 1992)). The consensus map is only a linear approximation of the map positions of certain loci. Information about unambiguous gene order can be obtained in Fig. 2 andTable 2, which show markers that have been mapped relative to each other in a single cross. Updated Recombinant Inbred (RI) strain haplotypes are included in Table 3, and an updated chromosomal aberrations table notes extinct anomalies in Table 4.
Chr 13 Loci
The new loci include 14 molecular markers defining new functional genes or pseudogenes. These are: cyclin B 1-related sequences (Ccnbl-rs6 and Ccnbl-rsl3), high-mobility-group protein related s e q u e n c e s , integrin alpha-1 [Itgal (formerly Vial)], glioblastoma oncogene homolog-3 (Gli-3), Marcks gene-related protein-related sequence4 (Mrp-rs4), SWR/RJ ecotropic proviral integration-5 (Srev-5), thiopurine methyltransferase (Tpmt), lymphocyte antigen-28 (Ly-28), lym-