PMID-sentid Pub_year Sent_text comp_official_name comp_offsetprotein_name organism prot_offset 8991058-4 1996 We have found that, after an acute dose of ethylnitrosourea (ENU, 250 mg/kg) the mutant frequency for both lacZ transgene and Dlb-1 remained constant between 10 and 70 days after mutagenesis in the small intestine, where cell turnover is rapid (approximately 7 days). Ethylnitrosourea 43-59 beta-1,4-N-acetyl-galactosaminyl transferase 2 Mus musculus 126-131