PAPSS2 (3'-Phosphoadenosine 5'-Phosphosulfate Synthase 2): PAPSS2 is essential for the biosynthesis of PAPS (3'-phosphoadenosine 5'-phosphosulfate), a key sulfate donor in various sulfation reactions. It's important in the metabolism of hormones, drugs, and other molecules. Mutations in PAPSS2 can lead to disorders like spondyloepimetaphyseal dysplasia, underscoring its role in skeletal development....