tokens: To isolate this gene , a P-1 artificial chromosome ( PAC ) library was screened with a full length UGT2B7 probe and a clone of approximately 100 kb in length was isolated .
folded_tokens: to isolate this gene , a p-1 artificial chromosome ( pac ) library be screen with a full length ugt2b7 probe and a clone of approximately 100 kb in length be isolate .