May contribute to the regulation of cell proliferation. Monomer and homodimer. Subcellular location depends on the isoform. Additional isoforms seem to exist. Detected in liver and in brain (at protein level). Detected in liver, spleen, lung, brain, hypothalamus, cerebellum, pituitary, heart and skeletal muscle. This protein is coded from a FGF2 (BFGF) gene antisense transcript. Belongs to the Nudix hydrolase family. The rat protein was reported to play a role in DNA repair (PubMed:9406864), based on its ability to complement E.coli deficient in the DNA repair enzyme mutT that hydrolyzes oxidized guanine nucleotides. PubMed:17569023 found no such activity, neither for the human nor the rat protein.