The lactate permease (LctP) family (TC# 2.A.14) is a family of transport proteins belonging to the ion transporter (IT) superfamily.
Characterized members of this family possess 15-18 transmembrane segments (TMSs) and are roughly 460-565 amino acyl residues in length.
Transport reactions catalyzed by functionally characterized members of the LctP family include:<blockquote>D- or L-lactate or glycolate (out) + H<sup>+</sup> (out) â D- or L-lactate or glycolate (in) + H<sup>+</sup> (in).</blockquote>