NewslettersImmune Regulation News Target ssDNA Activates the NADase Activity of Prokaryotic SPARTA Immune System By Noshin Noorjahan - November 6, 2023 0 Researchers used cryo-electron microscopy to determine the structures of inactive monomeric and active tetrameric Crenotalea thermophila short prokaryotic Ago/TIR–APAZ (SPARTA) complexes. [Nature Chemical Biology] AbstractGraphical Abstract