Pepsinogen, an enzyme or not?
Depree, Jonathan A
depreej at lincoln.ac.nz
Fri Apr 17 10:59:22 EST 1998
In article <3536A3F2.1231 at sci.fi> Miiko Sokka <meeco at sci.fi> writes:
>From: Miiko Sokka <meeco at sci.fi>
>Subject: Pepsinogen, an enzyme or not?
>Date: Thu, 16 Apr 1998 17:36:02 -0700
>Can you call a pepsinogen an enzyme although it is nothing but a
>non-functioning preliminary stage of a pepsin?
I would call it a zymogen. A molecule which gives rise to an enzyme but has no
enzymic activity. That's how your stomach cells can secrete digestive enzymes
without digesting themselves.
>What is an alfa-amylase?
An enzyme which breaks down alpha amylose, ie a polymer of glucose sugars
joined by alpha 1-4 glycosidic links (starch). A glucose polymer of beta 1-4
glycosidic links is cellulose and would be broken down by cellulase.
Hope this helps.
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