"
Team:The Agency Escondido/notebook
From 2013hs.igem.org
April 9
Andrew Buss prepared 120 mL of LB broth
April 10
Andrew Buss prepared two LB plates without antibiotics, using our LB plate protocol, rev 72.
Andrew Segina and Vansh Singh inoculated two ampicillin/kanamycin LB plates with E. coli containing Parts A and B from the 3A assembly kit
Andrew Buss inoculated an SOB plate with NEB10 competent E. coli
April 11
Andrew Segina inoculated an SOB plate with NEB10 competent E. coli
The plates previously inoculated with E. coli with parts A and B do not show visible growth
Andrew Segina prepared 1 L of YPD broth without dextrose
April 12
Andrew Buss inspected plates at 8:15 AM. Both NEB10 plates showed visible growth. Neither plate with Part A or B displayed growth.
Andrew Buss prepared four YPD plates from the 1L stock and mixed 4 grams of table sugar before pouring
Andrew Buss inoculated two LB tubes each with E. coli with parts A and B directly from the agar stabs included in the 3A assembly kit. The intention was to diagnose the lack of growth on the A and B plates over two days.
Andrew Buss inspected plates again around 1:00 PM. NEB10 plates showed additional growth, and the plate with Part A contained visible colonies. The plate with Part B did not show growth, however.
Grant Hassinger mixed 100 mL of LB broth and began an autoclave cycle with the media
Vansh Singh inoculated a tube of ampicillin/kanamycin LB broth from the 3A assembly kit with a colony from the Part A plate
Vansh Singh inspected Part B plate at 10:20pm. Part B plate showed visible growth.
Vansh Singh inoculated a tube of ampicillin/kanamycin LB broth from the 3A assembly kit with a colony from the Part B plate
Vansh Singh prepared a tube of ampicillin/kanamycin LB broth from the 3A assembly kit without inoculation. The tube was placed into the refrigerator
Andrew Buss inoculated a tube of LB broth with a colony from the NEB10 plate from April 10
April 13 labeled media
| Andrew Segina | LB plate | Part A from kit | Ampicillin, kanamycin | |
| Andrew Segina | LB plate | Part B from kit | Ampicillin, kanamycin | |
| Andrew Buss | SOB plate | NEB 10 from kit | ||
| Andrew Segina | SOB plate | NEB 10 from kit | ||
| Andrew Buss | LB tube | Part A from kit | Incubating in dry bath | |
| Andrew Buss | LB tube x2 | Part A from kit | Incubating in dry bath | |
| Andrew Buss | LB tube x2 | Part B from kit | Incubating in dry bath | |
| Vansh Singh | LB tube | Part A from 4/10 plate | Incubating in dry bath | |
| Vansh Singh | LB tube | Part B from 4/10 plate | Incubating in dry bath | |
| Andrew Buss | LB tube | NEB 10 from 4/10 SOB plate | Incubating in dry bath |
April 13 available media
| Andrew Segina | 800 mL YPD | Lacks dextrose |
| Andrew Buss | 4 YPD plates | |
| Andrew Buss | 2 LB plates | |
| Andrew Segina | 8 LB plates | |
| Andrew Buss | ~10mL LB tube | In dry bath for comparison |
| Andrew Buss | ~40mL LB broth | |
| Vansh Singh | ~5mL LB broth | Ampicillin, kanamycin |
| Grant Hassinger | 100mL LB broth |
April 16
Our refrigerated centrifuge arrived, removing the final obstacle to 3A assembly. However, the centrifuge did not consistently power up. This issue was initially ascribed to a faulty fuse.
Vansh Singh performed DNA Miniprep for self grown colonies as per the iGEM 3A Assembly Kit
April 17
Upon closer inspection of the centrifuge, it became evident that it was in fact missing a fuse. When a 20A fuse was installed, the centrifuge powered up normally. Several test runs indicated temperature control in the range of -10 to 30 degrees C, and an effective maximum centrifuge speed of 2500 RPM (despite a dial that can be turned to 6,000 RPM).
Vansh Singh transferred DNA of Part A, Part B, and NEB10 colonies to Ependorfs to find concentration of DNA
Andrew Buss prepared 100 mL of LB broth using revision 14 of our LB broth protocol. However, autoclaving was deferred until a larger batch of material needed autoclaving.
Andrew Buss inoculated two tubes of LB broth with E. coli containing Part A and Part B from the 4/10 plates to provide additional miniprep material for the following day. Due to the scarcity of ampicillin/kanamycin media (antibiotics to be ordered soon), these were cultured without antibiotics.
Evan Santos and Grant Hassinger streaked 3 agar plates with 3 different yeast samples for colonial development.
April 18
The tubes containing Part A and Part B had not displayed visible growth from the night before. However, the tubes inoculated on 4/12 displayed growth.
Andrew Buss extracted plasmid DNA containing Part A and Part B from the cells in the 4/12 tubes using the 3A assembly kit miniprep protocol. RNAse 1 was accidentally omitted from the P1 buffer, so it will need to be introduced before transformation. The two resulting samples were placed in the freezer, labeled "ATB A" and "ATB B". Halfway through the process, the non-refrigerated microcentrifuge was relocated to the interior of our refrigerator, because its operation generates enough heat to risk damaging the DNA samples.
Before restriction can proceed with any of our DNA fragments, the concentration of DNA in the samples must be measured. Our lab does not own a nanodrop machine, so Andrew Segina will use one at a local university to perform the measurement.
When the centrifuge was moved, it did not power up. After the purchase of a replacement fuse, the centrifuge's inconsistent operation was revealed as a consequence of an internally loose power cable. Depending on the orientation of the cable, the centrifuge may not turn on.
Vansh Singh researched GFP and RFP genes for project.
Andrew Buss inoculated three LB tubes and one LB plate with NEB10 cells from the 4/10 plate in preparation for transformation the following day.
April 19
All three NEB10 tubes from 4/18 showed significant growth. The plate from 4/18 showed faint streaks but no isolated colonies.
Quantification of the miniprepped DNA samples from the 18th has been postponed to Monday 4/22. Andrew Buss and Vansh Singh chose to continue with the 3A protocol in the interim, beginning with the restriction of the supplied DNA samples.
Andrew Buss completed restriction digest of all four samples of DNA from the 3A assembly kit: Part A, Part B, pSB1C3 plasmid backbone, and RFP control. However, 22.5 uL of distilled water was pipetted into the RFP restriction reaction, as in the other reactions, rather than the 17.5 uL specifically prescribed for the RFP tube.
Vansh Singh completed Restriction Digest of DNA from kit as per iGEM 3A Assembly kit
Andrew Buss completed ligation of the digests of Parts A and B, plus the plasmid backbone, from the earlier restriction.
April 20
Andrew Buss had planned to perform transformation. The link to the competent cell production protocol was broken, so it was incorrectly assumed that the transformation protocol had been revised to include the competent cell production. The protocol was discovered in the printed copies distributed with the 3A assembly kit, and required large centrifuge tubes and CCMB80 buffer, which our lab lacks. These are to be ordered soon, but in order to expedite transformation, a New England Biolabs order for competent cells is also to be placed.
The 4/18 NEB10 plate showed uniform growth along the streaks, rather than increasingly isolated colonies along the streak. Andrew Buss recalls that he did not flip the inoculating loop after performing the initial inoculation but before streaking, an error that was responsible for the unusual growth.
Andrew Buss inoculated a second LB plate with a section of NEB10 cells from the 4/18 NEB10 plate.
April 20 labeled media
| Andrew Segina | LB plate | Part A from kit | Ampicillin, kanamycin | In refrigerator |
| Andrew Segina | LB plate | Part B from kit | Ampicillin, kanamycin | In refrigerator |
| Andrew Buss | SOB plate | NEB 10 from kit | In refrigerator | |
| Andrew Segina | SOB plate | NEB 10 from kit | In refrigerator | |
| Andrew Buss | LB tube | Part A from kit | Incubating in dry bath | |
| Andrew Buss | LB tube | Part B from kit | Incubating in dry bath | |
| Andrew Buss | LB tube | Part A from 4/10 plate | Incubating in dry bath | |
| Andrew Buss | LB tube | Part B from 4/10 plate | Incubating in dry bath | |
| Andrew Buss | LB tube x3 | NEB 10 from 4/10 SOB plate | Incubating in dry bath | |
| Andrew Buss | LB plate | NEB 10 from 4/10 SOB plate | Incubating | |
| Andrew Buss | LB plate | NEB 10 from 4/18 NEB 10 plate | Incubating |
April 20 available media
| Andrew Segina | 800 mL YPD | Lacks dextrose |
| Andrew Segina | 8 LB plates | |
| Andrew Buss | ~5mL LB broth | |
| Vansh Singh | ~5mL LB broth | Ampicillin, kanamycin |
| Grant Hassinger | 100mL LB broth | |
| Grant Hassinger | 100mL LB broth |
April 23
Andrew Buss's LB broth from April 17 was not autoclaved because there were no other autoclave operations with which to batch it. The broth was contaminated in the intervening time and is not usable. In the future, media will be autoclaved immediately after mixing.
Grant Hassinger reinoculated one LB tube with E. coli with parts B from Andrew Buss's
Andrew Buss and Vansh Singh accompanied Andrew Segina to a local university to use a nanodrop machine to quantify the DNA samples from 4/18. The readings on all samples were outside of the range of the machine - either our samples were too concentrated or too dilute, or impurities were introduced. Supplies for agarose gel runs are on order - we will verify that we have any DNA fragments of the correct length when the supplies arrive.
