1 ﹒ Sambrook J,Fritsch EF,Maniatis T ﹒ Molecular Cloning:A Laboratory Manual(2nd). New York:Cold Spring Harbor Laboratory Press,1989.7 ﹒ LiangP,PardeeA B . Differential displayo fe ukaryotic messengerR NAb y means of the polymerasec hainr eac tion . Scien ......