Journal of Lipid Research, Vol 18, 777-780, Copyright © 1977 by Lipid Research, Inc.
A rapid and sensitive radiochemical assay for phosphatidic acid phosphohydrolase activity
TJ Flynn, DS Deshmukh and RA Pieringer
A technique is described for the radiochemical assay of phosphatidic acid
phosphohydrolase activity in rat brain. Radiochemically pure 32P- labeled
phosphatidic acid of known specific radioactivity and structure, which was
biosynthesized in vitro by the diacylglycerol kinase of E. coli, was used
as the substrate. As little as 5 microgram of microsomal or mitochondrial
protein can be used for the assay, and product formation in the picomole
range can be determined accurately. This procedure should be useful in
situations where only limited amounts of tissue are available.