using primers F1 (hybridising outside the targeting construct) and mR as indicated in (A) results in a 1,416-bp fragment.
(E) Northern blot analysis of total RNA isolated from testis of homozygous wt and XpdTTD/TTD, heterozygous Xpd†XPCS/wt and XpdTTD/wt, and compound heterozygous Xpd†XPCS/TTD mice as indicated. Hybridisa