Abstract
The immune response of mice to the α-l-6 epitope of dextran (Dx) B512 was found to be under genetic control. The congenic mouse strains A, A.CA, A.SW, A.TH, and A.TL exhibited a specific defect in their response to α-l-6. Also strain CBA/N was unresponsive to α-1-6, but the mechanism of unresponsiveness was found to be different.