Help in Primer designing for expression...

Aawara Chowdhury via (by aawara from
Mon Jul 20 08:43:01 EST 2009

In <DAwNpmA59GZKFArl from>,
 Duncan Clark <blackhole from> wrote:

> Historians believe that in newspost 
><mailman.618.1248049891.21502.methods from> on Sun, 19 Jul 2009, 
> Dr. Hiranya S. Roychowdhury <hroychow from> penned the following 
> literary masterpiece:
>>Since the ATG start codon is part of the NCO1 sequence,  we use that RE
>>site for in-frame ligation.  So, if your amplicon is digested and
>>religated at the NCO1 site, you should be fine.
> Just remember that for Nco I,  the codon following the ATG must start 
> with a G  either original or you must add one i.e.  CC - ATG - GNN
> Also pick the correct pET21 i.e. pET21d  :-)
> For this reason I much prefer to use Nde I whenever possible i.e. 
> CATATG. No problems with extra aa's.

NcoI can be fairly versatile as well.  An NcoI overhang is compatible
with BspHI (TCATGA) and PciI (ACATGT).

So, the second codon (after ATG) can begin with G (NcoI), A(BspHI), or
T(PciI).  Between these three, the second amino-acid can be anything
other than histidine and proline.

Email: echo 36434455860060025978157675027927670979097959886449930P | dc

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