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