... Bacillus subtilis orthologue) that is also conserved in GTP cyclohydrolase I (FolE), another T-fold member ... NADPH, 0.025 μM QueF, and variable preQ 0 (0.066−2.0 μM) at 30 °C. The reaction ... specified, aliquots of 50 μL were transferred to an equivalent volume of 0.3 M HCl and ...