dAMP(out) + phosphate(in) => dAMP(in) + phosphate(out)
damp(out) + phosphate(in) => damp(in) + phosphate(out)
dAMP(out) + phosphate(in) => dAMP(in) + phosphate(out)
damp(out) + phosphate(in) => damp(in) + phosphate(out)