{'fraction_non_alphanumeric': 0.030038759689922482, 'fraction_numerical': 0.035852713178294575, 'mean_word_length': 5.005813953488372, '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}}
A suppressor of nonsense mutations in Bacillus subtilis.

The suppressor-sensitive mutants of phage 429, susB47 and susN212, do not induce the synthesis of proteins NP1 and 11, respectively, when they infect Bacillus subtilis su-. A new polypeptide of molecular weight 75000, smaller than that of protein NP1, is produced in susB47-infected cells. An analysis of the methionine-containing tryptic peptides of protein NP1 and the 75000-molecularweight polypeptide showed that both proteins are related. When mutants susB47 and susN212 infect B. subtilis su+3, a small amount of proteins NP1 and 11, respectively, is synthesized, the level of the suppression being about 10 %. The results indicate that the B. subtilis su+3 strain is a suppressor of nonsense mutations. Nonsense mutants are very useful to detect protein gene products as under restrictive conditions a complete protein is not synthesized; instead, a fragment of length related to the position of the mutation is produced [I]. In Escherichia coli several strains which