<p>This entry represent a xanthine-specific phosphoribosyltransferase of <taxon tax_id="1423">Bacillus subtilis</taxon> and closely related proteins from other species, mostly from other Gram-positive bacteria. The adjacent gene is a xanthine transporter; B. subtilis can import xanthine for the purine salvage pathway or for catabolism to obtain nitrogen.</p> Xanthine phosphoribosyltransferase