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Team:NRP-UEA-Norwich/Week6
From 2012.igem.org
Welcome to the NRP UEA iGEM 2012 Wiki Lab Book
Please choose the relevant link to access our diary of that week!
Week Zero | Week One | Week Two | Week Three | Week Four | Week Five | Week Six | Week Seven | Week Eight | Week Nine | Week Ten | Week Eleven | Lab Protocols | Experiments
Contents |
Much of this week was focused on both the UK team meetup and the forum event that would happen on Sunday. We started the week on a high with the production of our first BioBricks. The team split up into groups to concentrate on different aspects. By Friday, everyone was super hyped about the UK meetup, despite the inhumanely early start. The UK meetup was a huge success. The forum was no different, we met and interacted with people of all ages, introducing them to synthetic biology and our project.
. Continued liason with GenScript about construct synthesis.
. We have BioBricks! The plates containing the ligations between B-M and M-B to pSB1C3 showed growth. These need to be validated before submission to iGEM.
. The Growth Study was repeated but lasted for 9 hours instead of 6 hours. A similar procedure was followed. Into 15ml of LB broth media, an inoculation of E.coli colony cells with or without transformation with PyeaR was added. Into these tubes, a varying amount potassium nitrate (0mM, 5mM and 10mM). Both absorbance and wavescan readings were taken. Readings were taken once every hour and between they were placed in a 37 degree celsius incubator. Instead of plating constantly, we changed our strategy. We decided to plate alpha cells initially at different concentrations within the media. Using a culture of alpha cells we diluted it at various amounts and took the absorbance readings and plated them. Using these we could then draw up a graph and work out the number of cells relative to the absorbance reading. However, this did not occur as smoothly as we had hoped. Furthermore, as the study only lasted for 9 hours, and the solutions inoculated from colonies and into 15ml of solution which was too dilute, the study did not produce the results we had hoped for. The cells we in lag phase throughout the study. Their numbers did not reach a high enough level within the culture for readings to be taken without a large relative inaccuracy from the spectophotometer. The study will be repeated after tweeking of the protocol. The samples were retained in an incubator to take final readings the next day to see whether they reached a high enough concentration.
. The retained PyeaR samples that were retained were taken out to take final readings. We pipetted 1ml into cuvettes and set the spectophotometers to take readings every minute for an hour and repeated the process of taking readings for 5 hours. Looking at the results, we realised that during the night, the cells had reached growth exponential stage and had gone into stationary phase.
. LB media and Agar media was made in vast quantities and autoclaved.
. To produce more M-B and B-M plasmid (already ligated into pSB1C3 plasmids) DNA, more colonies were inoculated into LB media. We plan to maintain a running culture of this, whereby we inoculate this into fresh culture daily.
. Finalising orders and clearance with finance.
. Forum preparation - plates with Biobrick written with one letter per plate (using the pYEAR with GFP and potassium nitrate to induce promoter activity). The potassium nitrate was directly added to the agar media. This was simply done by using one end of a glass spreader that we kept sterilising between plating and wrote on the plates directly. We printed large letters and placed the letter beneath the plates to aid with the writing. As most of the letters are mirrored, this did not effect the writing, only the letter R needed to be written freehand.
. Lukas and Pascoe carried out a growth study simmilar to those carried out on PyeaR on M-B and B-M. However, they started on much higher concentrations of M-B and B-M in the cuvettes. Looking at the results of these we found no noticeable difference between the growth pattern of Bioline alpha cells and our BioBricks. However, as the starting concentrations/absorbances were very varied, we decided to repeat this when repeating PyeaR and at the same time compare PyeaR to M-B and B-M.
. Forum preparation - cross words, amino acid decoding sheets, comprehension sheets and word searchers were made. Links to these will be uploaded.
. Forum preparation - posters containing information about synthetic biology and iGEM were finished and sent to be print.
. The poster for the UK meetup was made by Rebecca who used the helpful outline of the Forum poster made by Khadija.
. The presentation for the UK meet up was made and rehearsed in front of the other iGEMers.
. Forum preparation - plates used for the forum science day had their fluorescence intensified by adding more potassium nitrate to the cells on the plate. Using an ioculation loop, the cells which had expanded beyond a clean outline of each letter was scooped away and inoculated into media. Using this media, with different colonies, a spare set of plates were made in much the same way as those created the day before. However, we double the concentration of potassium nitate from 40 to 80mM.
. UK Team Meet-Up! The team took the day off lab in order to enjoy and host a great UK iGEM team meet up at the google campus, London (Cheak out human practices tab for more information about this day).
