( ...)Staphylococcus epidermidis

Multiporator / Electroporator 2510 Transformation Protocol Protocol No. 4308 915.534 01/2002 Microorganism Staphylococcus epidermidis Cell type Bacteria, gram positive Molecules injected Plasmid DNA (pC194) Growth medium Basic medium (BM: 1% peptone, 0.5% yeast extract, 0.1% glucose, 0.5% NaCl, 0.1% K₂HPO₄) Washing solution 10% glycerol (in distilled water) Electroporation solution 10% glycerol (in distilled water) Outgrowth medium SMMP50 medium (5.5 parts SMM buffer (1 M sucrose, 0.04 M maleic acid,
0.04 M MgCl₂, pH 6.5), 4 parts 7% Panassy broth, 0.5 parts 10% BSA) Cuvette 2 mm gap width Reference Augustin J. and Gtz F. 1990 FEMS Microbiology Letters 66 203-208 Making electrocompetent cells:

1. Inoculate a flask of BM with a fresh overnight culture. Grow at 37 C with shaking to an O.D.₅₇₈ of about 0.5 to 0.65. 2. Wash in one volume of 10% glycerol at room temperature, followed by washes with 1/2, 1/20 and 1/
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