Peroxisome Biogenesis Disorder 1b, also known as peroxisome biogenesis disorder, is related to peroxisome biogenesis disorder 1a and peroxisome biogenesis disorder 2b, and has symptoms including seizures An important gene associated with Peroxisome Biogenesis Disorder 1b is PEX1 (Peroxisomal Biogenesis Factor 1), and among its related pathways/superpathways are Peroxisomal lipid metabolism and Protein ubiquitination. The drugs Betaine and Gastrointestinal Agents have been mentioned in the context of this disorder. Affiliated tissues include liver and eye, and related phenotypes are failure to thrive and global developmental delay