{'fraction_non_alphanumeric': 0.013024602026049204, 'fraction_numerical': 0.002894356005788712, 'mean_word_length': 5.290909090909091, '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}}
Biosynthesis of versicolorin A

The incorporation of various potential intermediates into versicolorin A by a versicolorin A-accumulating mutant of Aspergillus parasiticus was studied. Both whole mycelium and cell-free extracts of this mutant were able to convert 14C-labeled versiconal hemiacetal acetate to versicolorin A. By the use of a labeled double substrate technique it was shown that two other compounds, versicolorin A hemiacetal and its acetate derivative, were also converted to versicolorin A. It is concluded that one or both of these compounds are intermediates in the biosynthesis of versicolorin A and therefore may possibly be involved in the biogenesis of the aflatoxins.