该PRPSAP1 Polyclonal Antibody. PRPSAP1 (phosphoribosyl pyrophosphate synthetase-associated protein 1), also known as PAP39, is a 356 amino acid ubiquitous protein belonging to the ribose-phosphate pyrophosphokinase family. PRPSAP1 may play a negative regulatory role in 5-phosphoribose 1-diphosphate synthesis and is encoded by a gene mapping to human chromosome 17q25.1.