X-Message-Number: 19162
Date: Mon, 27 May 2002 16:55:37 -0700 (PDT)
From: Driven FromThePack <>
Subject: Chemical activity at cryo temps per recent paper?

Crossposted from Extropian list:

This Nature article (subscription required):

Berglund, G. I., et al
"The catalytic pathway of horseradish peroxidase at
high resolution"
Nature 417:463-468 (2002)


contains the following statement:

"Electron transfer reactions and proton-coupled
electron transfer
 processes readily occur at cryogenic temperatures in
 crystals along with small-scale movements of ligands
and side chains."

I was under the impression that when frozen to LN2
all chemistry came ceased.  Is this inaccurate?

Any feelings about what impact this might have on
cryonic suspendees?


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