FIG. 2.

Intronless gene and chromosomal mapping of mouse Insm1. (A) Mouse Insm1 is tightly linked to the marker D2Mit109, which localizes mouse Insm1 between 80 and 82 cM on the integrated map of chromosome 2. (B) The size of PCR products amplified from mouse Insm1 cDNA and mouse Insm1 genomic DNA is the same, indicating that Insm1 is an intronless gene.