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Sequencing Reaction: (Sequenase)

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Preparation of samples to be sequenced:

Denature DNA

NaOH (4M) 1uL
EDTA (4mM) 1uL
dH2O 15.5uL
DNA 2.5uL
Total 20.0uL

Incubate at room temp. For 5 min.

Ethanol precipitate to pellet the DNA

5M NH4OAc 4uL
2X vol. 100% EtOH 40uL

spin for 15 min., wash with 70% EtOH, spin and speed vac to dry.

Add 7uL dH2O to the pellet to resuspend.

Heat the DNA at 95ºC for 5 min.

Quick cool by placing in ice water.

Annealing DNA to primer

DNA 7uL
Primer (5 pmol/uL) 1uL
Sequenase buffer 2uL
Total 10uL

Incubate at 42ºC for 20 minutes.

Labelling Reaction: (For 4 reactions)

Annealing reaction 10uL
DTT (0.1M) 1uL
dITP labelling mix (1:10 dilution) 2uL
35S-dATP 0.5uL
Sequenase (1:7 dilution in TE) 2uL
Total 15.5uL

Diluted Labelling Mix (1:10) (dITP)

labelling mix 1uL
dH2O 9uL
TOTAL 10uL

Diluted sequenase (1:7)

1uL sequenase
0.5uL pyrophosphate
6.5uL cold TE
TOTAL= 8.0 uL

Incubate at room temperature for 5 min.

Add 2.5uL each of G,A,T and C termination into separate tubes. (G,A,T and C that go with dITP labelling mix).

Termination Reaction:

Add 3.5uL of the labelling reaction to each of the tubes with G, A, T, and C.

Incubate at 37ºC for 10 min.

Add 4uL of stop mix to each tube.

Heat samples at 85ºC for 5 min. before loading onto the gel. (Gel was pre-run by Andrew and made by Andrew)

Loaded Samples
T7---------> T7<--------(FO-Zc)
G A T C G A T C

-gel was dried at 80ºC for 1.25 hours and placed on film for overnight exposure.