highly significantp <.0001
In these additional analyses, the difference in GCV frequencies between WT and PARP−/− cells at the IgL locus remains highly significant ( p <.0001 and p = .0006, respectively), although the number of mutations scored at the less well defined IgH locus was not sufficient to reveal a significant difference in these more conservative analyses ( p = .1023 and p = .1280, respectively).