IUBio

logarithmic derivatives again

Douglas B. Kell dbk at aber.ac.uk
Wed Jan 29 04:01:35 EST 1997


I had avoided this, but was encouraged by Athel in an email about something 
else to put my $0.02 in:

> >PPS - I haven't joined the discussion about log control coeffs, but
> >believe me (and here I unusually side with Martin Brand): no UK
> >undergraduates know what logs are or what d ln means, dy/y upon dx/x
> >is just about intelligible for them, and to be preferred for didactic
> >purposes.

That of course was biology undergraduates, and I would add that the 'truth' 
can/should of course be used in the simulations, but can be more or less 
hidden from people who may, if they are up to it, be exposed gently via the 
Help file.

Finally (despite flak that may appear) I personally have come to prefer true 
simulations, of which classical MCA may be seen as a subset. This is because 
of the 'large changes' issues surrounding biotechnology, metabolic pathway 
engineering and the like, where we recognise that large changes in individual 
or even several enzymes lead to a priori quite unpredictable effects on 
fluxes.

All the best,
Douglas.
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