Usage History of 'ribozymes'

The following chart shows how frequently 'ribozymes' appeared in printed materials over time. For example, the word 'ribozymes' occurred 2 times in books in 1971 and 5,133 times in 2008. From 1971 to 2008, the word 'ribozymes' was used a total of 67,854 times in books scanned by Google. See Reference: Google Ngram project.

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