label: biotin transmembrane transporter activity
label_lc: biotin transmembrane transporter activity
description: "Enables the transfer of biotin from one side of a membrane to the other. Biotin is cis-tetrahydro-2-oxothieno(3,4-d)imidazoline-4-valeric acid; the (+) enantiomer is very widely distributed in cells and serves as a carrier in a number of enzymatic beta-carboxylation reactions."