Multiple components of transport are associated with murine cationic amino acid transporter (mCAT) expression in Xenopus oocytes.

Expression of putative amino acid transport proteins is usually assumed to be associated with expression of a single component of transport. It is shown in this report, however, that murine cationic amino acid transporter (mCAT) expression in Xenopus oocytes is associated in important instances with expression of more than one kinetically distinguishable transport process. Accurate knowledge of the kinetics of transport continues, therefore, to be needed to understand how transport proteins function.