L-thyroxine sulfate(out) <=> L-thyroxine sulfate(in)
l-thyroxine sulfate(out) <=> l-thyroxine sulfate(in)
L-thyroxine sulfate(out) <=> L-thyroxine sulfate(in)
l-thyroxine sulfate(out) <=> l-thyroxine sulfate(in)