This transgene encodes the glycoprotein (GP) from Armstrong's clone of the lymphocytic choriomeningitis virus (LCMV) regulated by the rat insulin promoter. Upstream of the GP cDNA are 660 base pairs of regulatory elements in addition to the rat insulin promoter. Downstream of the GP c-DNA is the SV40 small T-antigen intron and late polyadenylation signal. RT-PCR analysis demonstrated that the transcript was expressed in the pancreas but not the thymus, spleen, liver, kidney, heart, muscle or lung.