careful buz, in what you claim.
the paper states that RNA can work as both enzyme and its traditional role. it's information about hte contruction of proteins is also basic biology now.
if I remember form my biology class correctly, all proteins are made of nucleic acids, which are comprised of three nitrogenous bases.
all enyzems are proteins (with few notable exceptions, such as the RNA thing here).
the order of the nucleic acids determines the shape of the protein.
and most of them denature when the acidity is too great or the heat to great. denaturing an enzyme (or protein) destroys it for good.
Almost all proteins are denatured when exposed to our stomach juice--basically because it has a low pH--somewhere inbetween 1 and 2. The ones that aren't are protected, for example, the bacteria that can live in your stomach have working enzymes, protected from the high acidity of the stomach.
I'm gonna make a bet that those enzymes you digest are surrounded by a base or a capsule that protects them from the stomach.
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