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US5695971A Phage-cosmid hybrid vector, open cos DNA fragments, their method of use, and process of production 失效
噬菌体 - 粘粒杂合载体,开放式COS DNA片段,其使用方法和生产过程

Phage-cosmid hybrid vector, open cos DNA fragments, their method of use,
and process of production
Abstract:
A hybrid vector produced from a linearized cosmid and arms from .lambda. phage vector DNA has been developed. The hybrid vector can be used to generate fragments which are useful as vectors in a helper phage-mediated transformation system, permitting large fragments of foreign DNA to be introduced into a host on an industrial scale.
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