Fatty
Acid Synthesis
Copyright © 2011 Kevin Ahern
For
fatty acid synthesis,
I
must reverse the path
Of
breaking fatty acids,
Though
youÕll wonder Ôbout the math
Each
cycle of addition starts
With
carbons one two three
Yet
the products of reactions
Number
carbons evenly
The
answer is that CO2
Plays
peek-a-boo like games
By
linking to an Ac-CoA
Then
popping off again
Three
reactions are like oxidations
Ôcept theyÕre backwards here
Reduction,
dehydration
Then
two hydrogens appear
The
product of the process
Is
a sixteen carbon chain
The
links are saturated
No
double bonds remain
For
them desaturases toil
Arranging only cis
The animals get delta nine
But
no more go past this
And
last thereÕs making longer ones
Eicosanoidic
fun
TheyÕre
made by elongases
In
the e. reticulum
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