Escherichia coli DH5α(PVAX1)

Storage conditions : 2~8 ℃

No. : 358946

Product format :freeze dried, 200ul

Validity : 6 years

Biosafety level : 1,  handle in ultra-clean table or safety cabinet

Receiving notice  if any abnormality is found on the day of receiving goods, please contact customer service within 24 hours. if the goods are overdue, the goods will be deemed as good. Dry powder shall not be retained once used up. Please activate in strict accordance with this instruction, otherwise the replacement service will not be provided if the strain is abnormal and inactivated.  

Host bacteria:BNCC353719 DH5α

Plasmid:BNCC341621 PVAX1 (containing kanamycin resistance gene).

Medium:LB resistant agar medium yeast extract 5.0g, peptone 10.0g,NaCl 10.0g, agar 15.0g (not included in liquid medium), distilled water 1.0 L,pH 7.0. Sterilization at 121 ℃ for 15min. After sterilization, cooling and cooling, add kanamycin to make the final content of kanamycin in the culture medium50μg/mL

Growth conditions:37 ℃ aerobic 18-24h.

Recovery steps:

1. Prepare 1 sterile liquid test tube (including 5~10mL of culture medium) and 2 pieces of 90mm plate;

2. After disinfecting the surface of the ampoule tube, open it in the safety cabinet, burn the top with an alcohol lamp, quickly drop sterile water to break it, and then break it with tweezers;

3. Suck 0.5mL of liquid culture medium and put it into the freeze-drying tube, fully dissolve it and return it to the liquid test tube again and mix well.

4. Draw the mixed solution from the test tube liquid to apply the flat plate, 200μL/piece;

5. Put all the test tubes and plates under the above specified conditions for cultivation. It is forbidden to seal and wind the plates. After 18-24 hours, observe the obvious turbidity of the culture medium and the growth of plate colonies or moss.

6. If the strain has not grown, it should continue to be cultured for 72h until a single colony or moss grows.

Plasmid purification:

1. pick a single colony and inoculate it into 50mL liquid LB resistance medium, and culture at 37 ℃ overnight;

2. according to the experimental requirements, absorb appropriate amount of bacterial liquid for plasmid extraction.