The yeast displays at least two distinct transporters involved
in the uptake of monocarboxylates across the plasma
membrane: the Lactate/Pyruvate: H+ Symporter Jen1p and the
Acetate: H+ Transporter (Ady2p). Additionally, the yeast genome
encodes five members of the Monocarboxylate Porter
(MCP) Family (De Hertogh et al. 2002), but their role in
importing monocarboxylic acids has not been proven (Makuc
et al. 2001; Reihl and Stolz 2005).