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有关操纵和修饰DNA序列的技术近年来获得一些进展,目前基因和基因控制区的特性已有可能在分子水平上进行研究。主要的进展是以细菌质粒作为载体,从而把非细菌的基因引入到细菌中。这种分子的克隆技术的出现,使得人们首次获得非常纯的、比原来作用更强的
Some progress has been made in the art of manipulation and modification of DNA sequences. At present, the characteristics of gene and gene control regions have been studied at the molecular level. The major advance is the use of bacterial plasmids as vectors to introduce non-bacterial genes into bacteria. The advent of this molecular cloning technique has made it the first time for people to obtain very pure and stronger