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Saliva has alpha-amylase (ptyalin), which hydrolyzes carbohydrates (so starch starts to taste sweet in just a few seconds), kallikrein, an enzyme that breaks down protein, and lingual lipase, which helps disintegrates fats (lipids). So next time you clean off a splattered insect from your wind-screen (windshield, should you prefer), think of it as external ...

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