Usage History of 'calpain'

The following chart shows how frequently 'calpain' appeared in printed materials over time. For example, the word 'calpain' occurred 4 times in books in 1959 and 3,909 times in 2008. From 1959 to 2008, the word 'calpain' was used a total of 81,052 times in books scanned by Google. See Reference: Google Ngram project.

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