Usage History of 'proenzyme'

The following chart shows how frequently 'proenzyme' appeared in printed materials over time. For example, the word 'proenzyme' occurred 4 times in books in 1885 and 587 times in 2008. From 1885 to 2008, the word 'proenzyme' was used a total of 27,724 times in books scanned by Google. See Reference: Google Ngram project.

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