deletions | additions       diff --git a/layout.md b/layout.md  index 66bded2..16ccd67 100644  --- a/layout.md  +++ b/layout.md 
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Author_contributions_Bill_Chan_1__.md Author_contributions_alphabetical_by_last__.md  Subject_areas_biochemistry_computational_biology__.md  Outline_Introduction_background_current_data__.md  Abstract_The_importance_of_enzymes__.md