3.1.21.2 6 - - 750388 3.1.21.2 6.5 - - 750388 3.1.21.2 7.5 - assay on the uracil-processing activity and 3'-5' exonuclease activity 683117 3.1.21.2 7.5 - DNA cleavage assay 683117 3.1.21.2 7.6 - assay at 716298 3.1.21.2 8 - assay at 666387 3.1.21.2 8 9 - 665452 3.1.21.2 8.4 9.2 - 134240