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− | <font color =”#279AD3”> Competent cells: E.Coli DH5⍺ </font></ | + | <font color =”#279AD3”> Competent cells: E.Coli DH5⍺ </font></h2> |
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− | + | <h3><font color =”94FAF1”> Objectives </font></h3> | |
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+ | <p>The objective here is to make a stock of E.Coli DH5⍺ competent cells for subsequent transformations.</p> | ||
− | + | <h3> <font color =”94FAF1”> Materials </font> </h3> | |
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+ | <h5> <font color =”#3CB5E1”> Stocks concentrations: </font> </h5> | ||
<li><p>O/N DH5⍺ pre-culture: O/N inoculation of 100 µL DH5⍺ into 100 mL LB.</p> | <li><p>O/N DH5⍺ pre-culture: O/N inoculation of 100 µL DH5⍺ into 100 mL LB.</p> | ||
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<ol> <li><p>Inoculation of 3 mL O/N culture in 100 mL LB in 500 mL erlenmeyer.</p> | <ol> <li><p>Inoculation of 3 mL O/N culture in 100 mL LB in 500 mL erlenmeyer.</p> | ||
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− | <p><font color = | + | <p><font color ="A6A6A6">NB: The competency of the prepared cells will be tested the 10/06.</font></p> |
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Latest revision as of 20:23, 19 October 2016
The objective here is to make a stock of E.Coli DH5⍺ competent cells for subsequent transformations. O/N DH5⍺ pre-culture: O/N inoculation of 100 µL DH5⍺ into 100 mL LB. 0.1M CaCl2: prepared the 05/06 0.1M CaCl2/15% Glycerol: prepared the 05/06 Inoculation of 3 mL O/N culture in 100 mL LB in 500 mL erlenmeyer. Incubation at 250 rpm at 37°C until the DO 0,6 —> DO = 0.615 Cells were transferred to 3 sterile ice-cold 50 mL Falcon tubes. 20 mL in each falcon tube. Incubate on ice for 30 min. Do not allow cells to warm up over 4°C. Spin cells at 4000 rpm for 10 min at 4°C. Discard supernatant and try to drain all remaining media. Gently resuspend on 10 mL cold 0.1M CaCl2 Incubate on ice 20 min Centrifuge 10 min at 4,000 rpm at 4°C Discard supernatant and gently resuspend on 5 mL cold 0.1M CaCl2/25% Glycerol Transfer in 1.5 mL eppendorf (100 µL/tube) Store at -80°C NB: The competency of the prepared cells will be tested the 10/06.
Competent cells: E.Coli DH5⍺
Objectives
Materials
Stocks concentrations:
Protocol
Competence: