The separation of chapter 1 quality grain DNA, purely turn and authenticate
The first upright conduct say
Pass the reorganization DNA technique to an useful purpose DNA part, send into be subjected to body cell in carry on breed with expression of tool call carry a body(Vector).The germ quality grain reorganizes to in common usely carry a body in the DNA technique.
Quality grain(Plasmid) the stable gene which is the outside of a kind of chromosome, size from 1-200 kbs not etc., for double chain, shut the DNA member of wreath, and exist by super and spiral appearance in host cell.The quality grain is main to discover at the germ and put line germ and fungi cell in, it has an independent replication and transcribes ability, can in the son generation the cell keep Heng settle of copy a number, and express the heredity information take.The replication of quality grain with transcribe and depend on some Maos and protein which code at the host cell, if leave host cell, can’t survive, and the host even have no them and can also normally survive.The existence of the quality grain makes the host have some additional characteristics, such as to anti- sex of the antibiotics etc..F quality grain(call F factor or property grain again), R quality grain(drug-resistant factor) with Col quality grain’s(produce the E. coli plain Continue reading »
May 07
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