Pepsin digest of Donkey Anti-Rat IgG(H+L), Mouse SP ads - Pooled antisera from donkeys hyperimmunized with rat IgG; purified by affinity chromatography on rat IgG covalently linked to agarose; reacts with the heavy and light chains of rat IgG and the light chains of rat IgM; cross-adsorbed against mouse serum proteins (SP) for minimal reactivity