Stevenson was sentenced to four years in prison for managing prostitutes and assault, but was released after 20 months. S tevenson was enraged by the La Presse story, though I have yet to find a press account in which he actually denied the details.
Genetic mutation. PKU is caused by a genetic mutation (change to the DNA) in the human phenylalanine hydroxylase (PAH) gene. There are many different types of mutations that can affect the PAH gene, all of which result in the body not producing a functioning PAH enzyme.
Phenylketonuria (PKU) (phenyl + ketone + -uria; /ËfinÉlËkitÉµnËjÊÉriÉ/) is an inborn error of metabolism involving impaired metabolism of phenylalanine, one of the amino acids.Phenylketonuria is caused by absent or virtually absent phenylalanine hydroxylase (PAH) enzyme activity.n people without PKU, the PAH enzyme breaks down any excess phenylalanine from these sources beyond what is needed by the body. However, if there is not enough of the PAH enzyme or its cofactor, then phenylalanine can build up in the blood and brain to toxic levels, affecting brain development and function.