Introduction. Phenylketonuria is an inborn metabolism error with a high phenotypical variability. due in part to the large number of implicated genetical variants (over 1200 reported) but also due to other factors. Establishing a genotype=phenotype correlation. https://www.roneverhart.com/Tc-Electronics-M350-Multi-Effects-and-Reverb-Processor-M350-p36058/