we previously constructed a bifunctionally active membrane-bound fusion protein , in which escherichia coli proline carrier ( the product of the putp gene ) was linked with beta-galactosidase ( the product of the lacz gene ) through a collagen linker ( hanada , k. , yamato , i. , and anraku , y . ( 1987 ) j. biol . chem . 262 , 14100-14104 ) .
C0025252
membrane
C0033684
product