Imperial College/11 September 2008

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*On the issue of which cells to track, we have decided to ignore dead cells, but we must take note of the % of cells with swimming motility. This excludes cells which drift. We have defined cells with swimming motility as '''cells which travel in the direction of their longitudinal axis'''.  
*On the issue of which cells to track, we have decided to ignore dead cells, but we must take note of the % of cells with swimming motility. This excludes cells which drift. We have defined cells with swimming motility as '''cells which travel in the direction of their longitudinal axis'''.  
*More cells will be tracked tomorrow and over the weekend.
*More cells will be tracked tomorrow and over the weekend.
 +
 +
==Wet Lab==
 +
 +
*Constructs 3, 6, 10 and 12 digested with ''Eco''RI and ''Spe''I ready for gel purification
 +
*Overnight ligations from yesterday transformed into Xl1-blue ''E. coli''.
 +
*Yesterday's bench ligations used to transform Xl1-blues failed to grow
 +
 +
{{Imperial/EndPage}}
{{Imperial/EndPage}}

Revision as of 00:23, 12 September 2008

August
MTWTFSS
        [http://2008.igem.org/Imperial_College/1_August_2008 1] [http://2008.igem.org/Imperial_College/2_August_2008 2] [http://2008.igem.org/wiki/index.php?title=Imperial_College/3_August_2008&action=edit 3]
[http://2008.igem.org/Imperial_College/4_August_2008 4] [http://2008.igem.org/Imperial_College/5_August_2008 5] [http://2008.igem.org/wiki/index.php?title=Imperial_College/6_August_2008&action=edit 6] [http://2008.igem.org/Imperial_College/7_August_2008 7] [http://2008.igem.org/Imperial_College/8_August_2008 8] [http://2008.igem.org/wiki/index.php?title=Imperial_College/9_August_2008&action=edit 9] [http://2008.igem.org/Imperial_College/10_August_2008 10]
[http://2008.igem.org/Imperial_College/11_August_2008 11] [http://2008.igem.org/Imperial_College/12_August_2008 12] [http://2008.igem.org/Imperial_College/13_August_2008 13] [http://2008.igem.org/Imperial_College/14_August_2008 14] [http://2008.igem.org/Imperial_College/15_August_2008 15] [http://2008.igem.org/Imperial_College/16_August_2008 16] [http://2008.igem.org/Imperial_College/17_August_2008 17]
[http://2008.igem.org/Imperial_College/18_August_2008 18] [http://2008.igem.org/Imperial_College/19_August_2008 19] [http://2008.igem.org/Imperial_College/20_August_2008 20] [http://2008.igem.org/Imperial_College/21_August_2008 21] [http://2008.igem.org/Imperial_College/22_August_2008 22] [http://2008.igem.org/wiki/index.php?title=Imperial_College/23_August_2008&action=edit 23] [http://2008.igem.org/Imperial_College/24_August_2008 24]
[http://2008.igem.org/Imperial_College/25_August_2008 25] [http://2008.igem.org/Imperial_College/26_August_2008 26] [http://2008.igem.org/Imperial_College/27_August_2008 27] [http://2008.igem.org/Imperial_College/28_August_2008 28] [http://2008.igem.org/Imperial_College/29_August_2008 29] [http://2008.igem.org/wiki/index.php?title=Imperial_College/30_August_2008&action=edit 30] [http://2008.igem.org/Imperial_College/31_August_2008 31]
September
MTWTFSS
[http://2008.igem.org/Imperial_College/1_September_2008 1] [http://2008.igem.org/Imperial_College/2_September_2008 2] [http://2008.igem.org/Imperial_College/3_September_2008 3] [http://2008.igem.org/Imperial_College/4_September_2008 4] [http://2008.igem.org/Imperial_College/5_September_2008 5] [http://2008.igem.org/wiki/index.php?title=Imperial_College/6_September_2008&action=edit 6] [http://2008.igem.org/Imperial_College/7_September_2008 7]
[http://2008.igem.org/Imperial_College/8_September_2008 8] [http://2008.igem.org/Imperial_College/9_September_2008 9] [http://2008.igem.org/Imperial_College/10_September_2008 10] [http://2008.igem.org/Imperial_College/11_September_2008 11] [http://2008.igem.org/Imperial_College/12_September_2008 12] [http://2008.igem.org/wiki/index.php?title=Imperial_College/13_September_2008&action=edit 13] [http://2008.igem.org/wiki/index.php?title=Imperial_College/14_September_2008&action=edit 14]
[http://2008.igem.org/Imperial_College/15_September_2008 15] [http://2008.igem.org/Imperial_College/16_September_2008 16] [http://2008.igem.org/Imperial_College/17_September_2008 17] [http://2008.igem.org/Imperial_College/18_September_2008 18] [http://2008.igem.org/Imperial_College/19_September_2008 19] [http://2008.igem.org/wiki/index.php?title=Imperial_College/20_September_2008&action=edit 20] [http://2008.igem.org/wiki/index.php?title=Imperial_College/21_September_2008&action=edit 21]
[http://2008.igem.org/Imperial_College/22_September_2008 22] [http://2008.igem.org/Imperial_College/23_September_2008 23] [http://2008.igem.org/Imperial_College/24_September_2008 24] [http://2008.igem.org/Imperial_College/25_September_2008 25] [http://2008.igem.org/Imperial_College/26_September_2008 26] [http://2008.igem.org/wiki/index.php?title=Imperial_College/27_September_2008&action=edit 27] [http://2008.igem.org/wiki/index.php?title=Imperial_College/28_September_2008&action=edit 28]
[http://2008.igem.org/Imperial_College/29_September_2008 29] [http://2008.igem.org/Imperial_College/30_September_2008 30]
October
MTWTFSS
    [http://2008.igem.org/Imperial_College/1_October_2008 1] [http://2008.igem.org/Imperial_College/2_October_2008 2] [http://2008.igem.org/wiki/index.php?title=Imperial_College/3_October_2008&action=edit 3] [http://2008.igem.org/wiki/index.php?title=Imperial_College/4_October_2008&action=edit 4] [http://2008.igem.org/wiki/index.php?title=Imperial_College/5_October_2008&action=edit 5]
[http://2008.igem.org/wiki/index.php?title=Imperial_College/6_October_2008&action=edit 6] [http://2008.igem.org/Imperial_College/7_October_2008 7] [http://2008.igem.org/wiki/index.php?title=Imperial_College/8_October_2008&action=edit 8] [http://2008.igem.org/Imperial_College/9_October_2008 9] [http://2008.igem.org/wiki/index.php?title=Imperial_College/10_October_2008&action=edit 10] [http://2008.igem.org/wiki/index.php?title=Imperial_College/11_October_2008&action=edit 11] [http://2008.igem.org/wiki/index.php?title=Imperial_College/12_October_2008&action=edit 12]
[http://2008.igem.org/Imperial_College/13_October_2008 13] [http://2008.igem.org/wiki/index.php?title=Imperial_College/14_October_2008&action=edit 14] [http://2008.igem.org/Imperial_College/15_October_2008 15] [http://2008.igem.org/Imperial_College/16_October_2008 16] [http://2008.igem.org/Imperial_College/17_October_2008 17] [http://2008.igem.org/wiki/index.php?title=Imperial_College/18_October_2008&action=edit 18] [http://2008.igem.org/wiki/index.php?title=Imperial_College/19_October_2008&action=edit 19]
[http://2008.igem.org/wiki/index.php?title=Imperial_College/20_October_2008&action=edit 20] [http://2008.igem.org/wiki/index.php?title=Imperial_College/21_October_2008&action=edit 21] [http://2008.igem.org/wiki/index.php?title=Imperial_College/22_October_2008&action=edit 22] [http://2008.igem.org/wiki/index.php?title=Imperial_College/23_October_2008&action=edit 23] [http://2008.igem.org/wiki/index.php?title=Imperial_College/24_October_2008&action=edit 24] [http://2008.igem.org/wiki/index.php?title=Imperial_College/25_October_2008&action=edit 25] [http://2008.igem.org/wiki/index.php?title=Imperial_College/26_October_2008&action=edit 26]
[http://2008.igem.org/wiki/index.php?title=Imperial_College/27_October_2008&action=edit 27] [http://2008.igem.org/wiki/index.php?title=Imperial_College/28_October_2008&action=edit 28] [http://2008.igem.org/wiki/index.php?title=Imperial_College/29_October_2008&action=edit 29] [http://2008.igem.org/wiki/index.php?title=Imperial_College/30_October_2008&action=edit 30] [http://2008.igem.org/wiki/index.php?title=Imperial_College/31_October_2008&action=edit 31]

Dry Lab

Histogram of Velocity
  • Tracked 23 cells (most were just running)
  • The figure below shows the velocity (per frame) distribution of cells.
  • We found that there were very few cells which were actually tumbling. Since we are going to use EpsE to control swimming motility of B. subtilis by stopping it, we have considered modelling it using 2 methods:
    • Velocity distribution: In this method, we track cells, and obtain a plot of run velocity of the wild type cells. Upon known EpsE expression, we obtain another plot and compare the velocity distributions. This method focuses on EpsE acting to slow down the motility of B. subtilis.
    • % of cells with swimming motility: In this method, we do not track cells, but count them over several frames to obtain the fraction of cells which are motile within a population. In this case we assume that when we combine the number of videos captured, it is representative of the entire population. If we see a significant drop in % of motile cells, we thus confirm EpsE's capability of disengaging the bacteria flagellar from its motor.
  • Since we are unable to successfully identify tumbling phase from running phase, we will only investigate its run velocity. Thus we will be extracting a series of frame-by-frame run velocities of each bacteria, and for each bacteria we take the mean of its velocity. Therefore, one bacteria contributes to only a single data point.
  • On the issue of which cells to track, we have decided to ignore dead cells, but we must take note of the % of cells with swimming motility. This excludes cells which drift. We have defined cells with swimming motility as cells which travel in the direction of their longitudinal axis.
  • More cells will be tracked tomorrow and over the weekend.

Wet Lab

  • Constructs 3, 6, 10 and 12 digested with EcoRI and SpeI ready for gel purification
  • Overnight ligations from yesterday transformed into Xl1-blue E. coli.
  • Yesterday's bench ligations used to transform Xl1-blues failed to grow



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