The Abb mouse was developed in the laboratory of Michael J. Grusby et al. of the Harvard School of Public Health. The model was created by targeting the H2-Ab1 gene in ES-D3 cells and injecting the targeted ES cells into C57BL/6 blastocysts. Resultant chimeras were backcrossed to C57BL/6 for 7 generations (N7), then backcrossed four generations (N4) to B6.SJL- Ptprca. NIAID received stock in 1994, and Taconic received stock in 1995 for the NIAID Transgenic Mouse Repository. The mice were then derived via backcross to B6.SJL-Ptprca. The mice were backcrossed once more to B6.SJL-Ptprca (N5), then intercrossed to homozygosity for both Abb and Ptprca. The mice were derived by embryo transfer again in 1997 (N6). The line was maintained by incrossing homozygous mice.
Wild type for Nnt mutation, carries Pde6brd1 mutation
Grusby MJ, Johnson RS, Papaioannou VE, Glimcher LH. (1991) Depletion of CD4+ T-Cells in Major Histocompatibility Complex Class II - Deficient Mice. Science, 253(5026):1417-1420.