title: Nucleotide precursor in riboflavin biosynthesis.
mesh_terms: D001203:Ascomycota / Q000378:metabolism*; D006147:Guanine / Q000378:metabolism; D006150:Guanine Nucleotides / Q000096:biosynthesis / Q000378:metabolism*; D006160:Guanosine Triphosphate / Q000378:metabolism; D012256:Riboflavin / Q000096:biosynthesis*; D004718:Saccharomycetales / Q000378:metabolism*
chemical_list: D006150:Guanine Nucleotides; D006147:Guanine; D006160:Guanosine Triphosphate; D012256:Riboflavin