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Quick link: iGEM:Harvard/2006



Week 1

Wed Jun 14

Transformation of standard components

  • cultured bacteria did grow overnight
  • 1 mL of each tube reserved to make glycerol stock
  • extracted DNA from remaining 4 mL using the standard protocol:
  1. Resuspended pelleted bacterial cells in 250 µl Buffer P1 (w/ RNAse) (kept at 4 °C) and transfered to a microcentrifuge tube.
  2. Added 250 μl Buffer P2 and gently inverted the tube 4–6 times to mix. Waited 2 min.
  3. Added 350 μl Buffer N3 and inverted the tube immediately but gently 4–6 times. Solution became cloudy.
  4. Centrifuged for 10 min at 14,000 rpm. A compact white pellet formed.
  5. Applied the supernatants from step 4 to the QIAprep spin column by decanting.
  6. Centrifuged for 60 s. Discarded the flow-through.
  7. Washed the QIAprep spin column with 0.5 ml Buffer PB and centrifuged for 60 s. Discarded the flow-through.
  8. Washed QIAprep spin column by with 0.75 ml Buffer PE and centrifuged for 60 s.
  9. Placed the QIAprep column in a clean 1.5 ml microcentrifuge tube. Eluted with 30 μl water to the center of each QIAprep spin column, let stand for 2 min, and centrifuged for 60 s.
  • digested promoter (R0010) and GFP (E0241) plasmids
    • R0010 digested with SpeI and PstI in order to leave it attached at upstream end to the plasmid backbone (otherwise, the fragment would only be ~200 bp long, which is a little too short for electrophoresis with much longer fragments
    • E0241 digested with XbaI and PstI in order to cleave it as a fragment
  1. The following ingredients were each added to four 1.5 ml centrifuge tubes:
    • 10 μl water
    • 8 μl DNA from the previous step (R0010-1, R0010-2, E0241-1, E0241-2 in respective tubes)
    • 2.5 μl 10x NEB buffer (#2 for R0010-01 and R0010-2, #3 for E0241-1 and E0241-2)
    • 2.5 μl 10x BSE
    • 1.0 μl 1:1 diluted enzyme A (SpeI for R0010-1 and R0010-2, XbaI for E0241-1 and E0241-2)
    • 1.0 μl 1:1 diluted enzyme B (PstI for all).
  2. Tubes were incubated at 37°C for 90 min.

Tue Jun 13

DNA nanostructure reaction PCR

  • order of lanes: 1) 1kb ladder, 2) full rxn (oligos + scaffold), 3) just scaffold, 4) just oligos
  • run on 2% agarose gel
  • appears that reaction was successful (upload gel image)

Transformation of standard components

Mon Jun 12

DNA nanostructure reaction PCR

Transformation of standard components

  • goal: insert three BioBrick plasmids (already containing BioBricks) into E. coli in order to amplify them
    • a positive control (E7104) with the T7 promoter upstream of GFP
    • the lac operon (R0010)
    • GFP (E0241)
  • procedure:
  1. -->procedure here!<--
  2. Plated the mixture on agar plates and incubated at 37°C for 24 h.


Error fetching PMID 14961116:
  1. Error fetching PMID 14961116: [shih0]
Error fetching PMID 11278776:
  1. Error fetching PMID 11278776: [shih1]
Error fetching PMID 11007486:
  1. Error fetching PMID 11007486: [shih2]

Other projects

My work in Biophysics 101

Contact info

Email me: (my last name) at fas dot harvard dot edu

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