Enables the transfer of a solute or solutes from one side of a membrane to the other according to the reaction: lactate (out) + H+ (out) = lactate (in) + H+ (in).
malate:proton symporter activity
monocarboxylate:sodium symporter activity +
myo-inositol:proton symporter activity
nitrate:proton symporter activity
nucleoside:proton symporter activity +
orotate:monoatomic anion antiporter activity
peptide:proton symporter activity
phenyl propionate uniporter activity
phosphate:proton symporter activity
phosphoenolpyruvate:phosphate antiporter activity
potassium:proton symporter activity
pyruvate secondary active transmembrane transporter activity