hexose:proton symporter activity rhamnose transmembrane transporter activity rhamnose:proton symporter activity Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: rhamnose(out) + H+(out) = rhamnose(in) + H+(in). GO:0015561 rhamnose:hydrogen symporter activity molecular_function TC:2.A.7.6