acetoacetate(out) + H(+)(out) => acetoacetate(in) + H(+)(in)
acetoacetate(out) + h(+)(out) => acetoacetate(in) + h(+)(in)
acetoacetate(out) + H(+)(out) => acetoacetate(in) + H(+)(in)
acetoacetate(out) + h(+)(out) => acetoacetate(in) + h(+)(in)