I need to find a supplier of a research grade enzyme.  I am looking
for the enzyme fumarate dehydrogenase or succinate dehydrogenase.  The
second enzyme I am looking for is accetate dehydrogenase.  I work in
an academic research lab and need these for experiments.  They have
thus far been impossible to locate in easy to purchase commercial
form.  I have of course checked all standard chemical suppliers such
as Sigma an Alfa Aesar.  Most likely this will be supplied by a small
chemicals manufacturer specializing in hard-to-find enzymes.  Thank
you for your help!