In a type of mold called Aspergillus niger, turning off a specific gene (AnGal4) makes it produce a lot more of a toxin called ochratoxin A—especially when it's fed arabinose sugar.

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Evidence from Studies

Supporting (1)

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Insights into the Underlying Mechanism of Ochratoxin A Production in Aspergillus niger CBS 513.88 Using Different Carbon Sources

Cross-Sectional Study

In Vitro

2022 Aug 12

The study shows that removing a specific gene (AnGal4) in a mold increases the amount of a harmful toxin it produces, exactly as the claim says.

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No contradicting evidence found

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Source Study

Insights into the Underlying Mechanism of Ochratoxin A Production in Aspergillus niger CBS 513.88 Using Different Carbon Sources

Score: 6

DOI: 10.3390/toxins14080551

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