2 D-alanine + ATP = D-alanyl-D-alanine + ADP + phosphate + H(+)
2 d-alanine + atp = d-alanyl-d-alanine + adp + phosphate + h(+)
2 D-alanine + ATP = D-alanyl-D-alanine + ADP + phosphate + H(+)
2 d-alanine + atp = d-alanyl-d-alanine + adp + phosphate + h(+)