N-acetyl-D-muramoyl-L-alanyl-D-isoglutamine(out) + 3 H(+)(out) <=> N-acetyl-D-muramoyl-L-alanyl-D-isoglutamine(in) + 3 H(+)(in)
n-acetyl-d-muramoyl-l-alanyl-d-isoglutamine(out) + 3 h(+)(out) <=> n-acetyl-d-muramoyl-l-alanyl-d-isoglutamine(in) + 3 h(+)(in)