Competent cells are bacteria which have been treated with chemicals and which are able to take up external DNA.

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Problem with bacterial transformation with electroporation

I have a problem with a bacterial transformation of a yeast gene that I can not solve. I isolated yeast DNA and did a PCR to get my product. I am using pCGCUm vector with a GFP construct. I digest ...
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Is every cell competent?

I would like to know if every cell is competent or if there are any cells that are not competent.
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Why am I getting low transformation efficiency with DB3.1 E.coli cells?

I am making competent cells using DB3.1 E. coli cells. Even after following the exact protocol (Inoue method for ultracompetent cells) given in 'Sambrook and Russel', I am not getting transformation ...
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Cell growth conditions for preparing electrocompetent cells

Usually the protocol for preparing electrocompetent E. coli cells calls for growing the cells at 37deg and 225rpms until they reach OD of 0.3. I was wondering, is there any reason they should grow at ...