{'fraction_non_alphanumeric': 0.03604651162790698, 'fraction_numerical': 0.009302325581395349, 'mean_word_length': 4.8175675675675675, 'pattern_counts': {'":': 0, '<': 0, '<?xml version=': 0, '>': 0, 'https://': 0, 'lorem ipsum': 0, 'www.': 0, 'xml': 0}, 'pii_count': 0, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
Promoter Structure of the RNA Polymerase II Large Subunit Gene in Caenorhabditis elegans and C. briggsae.

The 5'-end of the Caenorhabditis elegans ama-1 gene transcript, which encodes the largest subunit of RNA polymerase II, was cloned. Sequencing revealed that the message is trans-spliced. To characterize the Ce-ama-1 promoter, DNA sequence spanning 3 kb upstream from the initiation codon was determined. Typical elements, such as TATA and Spl sites, were absent. The homologue of ama-1 in C. briggsae, Cb-ama-1, was isolated and its 5' flanking sequence compared with that of Ce-ama-1, revealing only limited similarity, although both sequences included a potential initiator-class transcriptional regulator and phased repeats of an ATC motif. The latter elements are postulated to facilitate DNA bending and may play a role in transcription regulation.