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    venom127's Avatar
    venom127 Posts: 1, Reputation: 1
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    #1

    Nov 6, 2007, 06:53 PM
    Lactase enzymes
    Why does the enzyme lactase react with lactose but not with sucrose?
    gracelizabeth's Avatar
    gracelizabeth Posts: 2, Reputation: 1
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    #2

    Jan 26, 2008, 04:29 AM
    The enzyme lactase has an active site that will only break down lactose substrate (into glucose & galactose) because of its shape. Sucrose is broken down (into fructose & glucose) by sucrase as its active site fits with sucrose.

    All enzymes are substrate specific & will not break down anything other that what it is meant to.

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