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This article describes a simple enzymatic method for the quantitative detection of phenylalanine in blood by using snake venom. Useful as a test for diagnosis of the disease phenylketonuria and evaluating the effectiveness of a diet designed to be low in phenylalanine, the method is rapid and precise.
Periodical. La Du, Bert N., and Patricia J. Michael. "An Enzymatic Spectrophotometric Method for the Determination of Phenylalanine in Blood." Journal of Laboratory and Clinical Medicine 55, 3 (March 1960): 491-496. Article. 6 Images.. Journal of Laboratory and Clinical Medicine