New insights in research on purine and pyrimidine metabolism.

In June 2021, the Purine and Pyrimidine Society (PPS) organized the 19th biennial symposium on Purine and Pyrimidine metabolism (PP21). Due to the ongoing pandemic, the conference was organized as a webinar over 3 days with sessions dealing with enzymes, cancer, inborn errors, gout among others. The current issue of Nucleosides, Nucleotides & Nucleic Acids is a special issue covering proceedings from PP21-presentations and other PPS-related manuscripts, and in this editorial, we will give an overview of the scientific program of the meeting.