Team:University College London/LabBook/Week9

Step 1 – Creating culture media: In a sterile environment, set up X numbers of falcons, each with 5mls of media.

Step 2 - Inoculating Colonies into a Selective Broth:: Add Yul of antibiotic to reach desired antibiotic concentration.

(For Ampicillin this is 50ug/ml, For Kanamycin it is 25ug/ml, for Tetracycline it is 15ug/ml, and for Chloramphenicol it is 25ug/ml)

Step 4 – Selecting a Colony: Select a clear, isolated colony and using an inoculation hoop scoop up a colony onto the tip. Deposit in the falcon tube

Step 5 - Culture: Culture your falcon tubes overnight at a temperature of 37 oC. Leave for no longer than 16 hours.

Step 1 - Pellet Cells: Pellet 1.5-5ml bacterial culture containing the plasmid by centrifugation g = 6000

Time = 2 min

Temperature = (15-25oC)

Step 2 - Resuspend Cells: Add 250ul S1 to the pellet and resuspend the cells completely by vortexing or pipetting. Transfer the suspension to a clean 1.5ml microcentrifuge tube.

Step 3 - Puncturing Cell Membrane: Add 250ul S2 gently mix by inverting the tube 4-6 times to obtain a clear lysate. Incubate on ice or at room temperature for NOT longer than 5 min.

Step 4 - Neutralising S2: Add 400ul Buffer NB and gently mix by inverting the tube 6-10 times, until a white precipitate forms.

Step 5 - Centrifuge:

g: 14000

Time:10 minutes

Temperature: (15-25oC)

Step 6 - Centrifuge: Transfer the supernatant into a column assembled in a clean collection tube (provided. Centrifuge:

g = 10,000

Time: 1 minute

Temperature: (15-25oC)

Step 7 - Wash Column: Discard the flow-through and wash the spin column by adding 700ul of Wash Buffer. Centrifuge:

g - 10,000

Time - 1 minute

Temperature: (15-25oC)

Step 8 - Remove residual ethanol: Centrifuge:

g - 10,000

Time - 1 minute

Temperature: (15-25oC)

Step 9 - Elute DNA: Place the column into a clean microcentrifuge tube. Add 50-100ul of Elution Buffer, TE buffer or sterile water directly onto column membrane and stand for 1 min. Centrifuge:

g - 10,000

Time - 1 minute

Temperature: (15-25oC)

Step 10 - Storage: Store DNA at 4oC or -20oC

Step 1 – Creating culture media: In a sterile environment, set up X numbers of falcons, each with 5mls of media.

Step 2 - Inoculating Colonies into a Selective Broth:: Add Yul of antibiotic to reach desired antibiotic concentration.

(For Ampicillin this is 50ug/ml, For Kanamycin it is 25ug/ml, for Tetracycline it is 15ug/ml, and for Chloramphenicol it is 25ug/ml)

Step 4 – Selecting a Colony: Select a clear, isolated colony and using an inoculation hoop scoop up a colony onto the tip. Deposit in the falcon tube

Step 5 - Culture: Culture your falcon tubes overnight at a temperature of 37 oC. Leave for no longer than 16 hours.