L-alanine + ATP + H(+) = L-alanyl-5'-AMP + diphosphate
l-alanine + atp + h(+) = l-alanyl-5'-amp + diphosphate
L-alanine + ATP + H(+) = L-alanyl-5'-AMP + diphosphate
l-alanine + atp + h(+) = l-alanyl-5'-amp + diphosphate