We have recently cloned the carboxylesterase upstream sequence and showed its basal promoter activity in CHO cells .
we have recently cloned the carboxylesterase upstream sequence and showed its basal promoter activity in cho cells .
O O O O O B-DNA_domain_or_region I-DNA_domain_or_region I-DNA_domain_or_region O O O B-DNA_domain_or_region I-DNA_domain_or_region O O B-cell_line I-cell_line O