Team:HokkaidoU Japan/Notebook/aggregation Week 6

Ethanol precipitation

Ethanol precipitation for digestion and gel extraction product.

1. Added 5 ul of NaoAc, 1.5 ul of glycogen and 125 ul of 100% ethanol.
2. Centrifuged in 15000 rpm, 10 min at 4C.
3. Remove supernatant and added 220 ul of 70% ethanol.
4. Centrifuged in 15000 rpm, 10 min at 4C.
5. Remove supernatant and air drying in room temperature then added 10 ul of DW.

Ligation

We ligated pT7-RBS on pSB1K3 (digested Spe1) as vector and Ag43-dT (digested Spe1 and Xba1 and HindIII) as insert.

Ligation reaction time was written below.

mini-prep

mini-prep of pBad-RBS. We used FastGene Plasmid Mini Kit(Nippon Genetics) and got 50 ul of DNA solutions.

mini-prep result

transformation

Transformation of plasmid DNA (pT7-RBS-Ag43-dT on pSB1K3)
in E. coli(DH5α).

1. Added 2 ul of plasmid DNA to 50 ul of thawed competent cells on ice.
2. Incubated on ice for 30 min.
3. Added 600 ul of LB then incubated the cells for 2 hours at 37C.
4. Prepared and Labeled two LBK plates.
5. Plated 300 ul of the culture onto first dish and spread.
6. Added 900 ul of LB to 100 ul of the culture and plated 300 ul of it onto second dish and spread.
7. Incubated them at 37C for 16 hours.

Ethanol precipitation

Ethanol precipitation for mini-prep product (pBad-RBS). Because the refine of mini-prep product is not enough.
We use 15 ul DNA solution.

1. Added 1.5 ul of NaoAc(3 M), 1.5 ul of glycogen and 38 ul of 100% ethanol.
2. Centrifuged in 15000 rpm, 10 min at 4C.
3. Remove supernatant and added 220 ul of 70% ethanol.
4. Centrifuged in 15000 rpm, 5 min at 4C.
5. Remove supernatant and air drying in room temperature then added 10 ul of DW.

digestion

digestion of ethanol precipitation product(pBad-RBS).

digestion result

In this result, speI digested DNA completely.
So I think that the pT7-RBS on pSB1K3 DNA solution is not pure.

Gel extraction

Gel extraction for digestion product. We used FastGene Gel&PCR extraction kit(NipponGenetics)and got 50 ul of DNA solution.