Tag Archives: kanamycin

Cloning – Purified COX/PGS “qPCR Fragment” from 20111006

Cloned the purified “qPCR Fragment” from 20111006 using the TOPO TA Cloning Kit (Invitrogen). Performed a half reaction (total volume = 3uL), using 1uL of purified PCR product. Incubated at RT for 20mins and then placed reaction on ice. Transformed chemically competent TOP 10 cells (Invitrogen) and heat shocked at 42C for 30s. Added 250uL of RT S.O.C. medium and incubated at 37C, 200RPM. Plated cells on pre-warmed Kan50+X-Gal plates (plates from 20110726; X-Gal added ~30mins before plating cells). Incubated plates O/N, 37C.

Results:

Good number of white colonies (>30). Will screen each colony with both qPCR primer sets to see if we can differentiate between the two COX/PGS isoforms in these clones.

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Cloning – C.gigas COX2/PGS2 5’/3′ RACE Products (from earlier today)

The bands that were excised and purified earlier today were cloned in to pCR2.1 using the TOPO TA Cloning Kit (Invitrogen) according to the manufacturer’s protocol with the following changes: used 4uL of all PCR products, incubated ligation reactions for 15mins @ RT, incubated competent cells with ligation reactions for 15mins on ice.

Two volumes of each reaction were plated (50uL and 100uL) on Kan50 plates with X-gal (made 20010412 by SJW) and incubated @ 37C O/N.

Results:

Ample number of white colonies for all 4 sets of cloning reactions.

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Clone Restreaking – PGS2 Hi/Lo Clones (from 20110421)

Sequencing of the PGS2/COX2 clone failed (was empty vector). Restreaked bacterial clones on to a Kan50 plate (made 20110413 by SJW) from a plate that Caroline Storer had created from cloning colony selection on 20110421. Samples were labeled as PGS Lo 1 & 2 and PGS Hi 3 & 4. Additionally, there were red numbers on the plate associated with these four samples. They were 42 – 45, respectively. PGS Hi 4 (#45) was previously grown up and sequenced. This sample is what produced vector only sequence. Incubated O/N @ 37C. Hopefully we’ll bacteria is still viable and will have samples to grow up for miniprep, plamsid iso and sequencing.

Results:

Limited growth in all after O/N incubation. Will leave plate on bench over the weekend and hope to get more growth.

After the weekend on the bench, have growth in all but PGS Lo 2. Will inoculate liquid cultures for plasmid preps.

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