glycine betaine(in) + H(+)(in) <=> glycine betaine(out) + H(+)(out)
glycine betaine(in) + h(+)(in) <=> glycine betaine(out) + h(+)(out)
glycine betaine(in) + H(+)(in) <=> glycine betaine(out) + H(+)(out)
glycine betaine(in) + h(+)(in) <=> glycine betaine(out) + h(+)(out)