The most recent families added include the PAAP ( Putative Amino Acid Permease ), LIVCS ( Branched Chain Amino Acid : Cation Symporter ), NRAMP ( Natural Resistance-Associated Macrophage Protein ), CstA ( Carbon starvation A protein ), KUP ( Kz Uptake Permease ), BenE ( Benzoate : Hz Virginia Symporter ), and AE ( Anion Exchanger ).
32.
First, the CAP regulatory protein has to assemble on the " lac " promoter, resulting in an increase in the production of " lac " mRNA . More available copies of the " lac " mRNA results in the production ( see translation ) of significantly more copies of LacZ ( ?-galactosidase, for lactose metabolism ) and LacY ( lactose permease to transport lactose into the cell ).
