L-threonine + ATP <=> L-threonyl-5'-AMP + diphosphate
l-threonine + atp <=> l-threonyl-5'-amp + diphosphate
L-threonine + ATP <=> L-threonyl-5'-AMP + diphosphate
l-threonine + atp <=> l-threonyl-5'-amp + diphosphate