From owner-btk-mca@hgmp.mrc.ac.uk Mon Oct 8 16:56:13 2001 Return-Path: Received: from localhost (localhost [127.0.0.1]) by mercury.hgmp.mrc.ac.uk (Postfix) with ESMTP id B91E017ACE for ; Mon, 8 Oct 2001 16:56:10 +0100 (BST) Received: from localhost (localhost [127.0.0.1]) by mercury.hgmp.mrc.ac.uk (Postfix) with ESMTP id 9C4D117AD2 for ; Mon, 8 Oct 2001 16:55:53 +0100 (BST) Received: from niobium.hgmp.mrc.ac.uk (niobium [193.62.192.41]) by mercury.hgmp.mrc.ac.uk (Postfix) with ESMTP id 5E22217A99 for ; Mon, 8 Oct 2001 16:55:33 +0100 (BST) Received: (from news@localhost) by niobium.hgmp.mrc.ac.uk (8.9.3+Sun/8.8.8) id QAA09036 for btk-mca-list@hgmp.mrc.ac.uk; Mon, 8 Oct 2001 16:48:35 +0100 (BST) X-Authentication-Warning: niobium.hgmp.mrc.ac.uk: news set sender to using -f From: gavin X-Newsgroups: bionet.metabolic-reg Subject: Re: delta-G of biochemical reactions Date: Mon, 08 Oct 2001 10:48:24 -0500 Organization: Microbial Geochemistry and Bioenergetics, Washington University in St. Louis Lines: 8 Message-ID: <3BC1CAC8.1EFC4056@zonvark.wustl.edu> References: <3BB4AAA7.8790.DF1D392A@localhost> <77754d4.0110070742.6f61b8f@posting.google.com> <3BC0E343.192978FB@zonvark.wustl.edu> <77754d4.0110080604.47ee92d9@posting.google.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Complaints-To: usenet@newsreader.wustl.edu X-Mailer: Mozilla 4.78 [en] (Windows NT 5.0; U) X-Accept-Language: en To: btk-mca@hgmp.mrc.ac.uk Sender: owner-btk-mca@hgmp.mrc.ac.uk Precedence: bulk Sure, in your example, the relative concentrations of the species can be a result of kinetics. Also, maybe there is another source of B1, or some other agents chelating B2 preventing it from being accurately measured. The prerequisite of a thermodynamic drive is still there; both energetics and kinetics are important to consider. Gavin .