Adenine phosphoribosyltransferase Catalyzes a salvage reaction resulting in the formation of AMP, that is energically less costly than de novo synthesis. apt APT_STAAU 172 MDLKQYVSEVQDWPKPGVSFKDITTIMDNGEAYGYATDKIVEYAKDRDVDIVVGPEARGFIIGCPVAYSMGIGFAPVRKEGKLPREVIRYEYDLEYGTNVLTMHKDAIKPGQRVLITDDLLATGGTIEAAIKLVEKLGGIVVGIAFIIELKYLNGIEKIKDYDVMSLISYDE