Alternate name: phosphoribosylpyrophosphate synthetase In some systems, close homologs lacking enzymatic activity exist and perform regulatory functions. The model is designated subfamily rather than equivalog for this reason. [Purines, pyrimidines, nucleosides, and nucleotides, Purine ribonucleotide biosynthesis]
Jiyao W et al.(2023). "The conserved domain database in 2023.",