4-hydroxyphenylacetate(in) = 4-hydroxyphenylacetate(out)
4-hydroxyphenylacetate(in) = 4-hydroxyphenylacetate(out)
4-hydroxyphenylacetate(in) = 4-hydroxyphenylacetate(out)
4-hydroxyphenylacetate(in) = 4-hydroxyphenylacetate(out)