作者qazxsw23 (why me)
看板Biotech
标题[问题] 想问一题lac operon
时间Sun Dec 20 14:15:15 2009
虽然查过资料
但我还是不太懂到底是什麽情况下会抑制
you have isolated a new mutation of the lac operon
in E. coli. This mutation called super-repressor, i^s,
makes a repressor protein that binds so tightly to
the operator that inducer cannot release it.
a) is the diploid i+p+z+y+a+/isp+z+y+a+ inducible? why?
b) is the diploid i+ocp+z+y+a+/isp+z+y+a+ inducible? why?
c) how can you tell i^s mutants apart from p- mutants
of the operon?
希望有人可以教我一下到底原理是什麽
因为我查过书还是看不懂!!
谢谢
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