Introduction to Recombinant Genetics- Biology 350

DNA Sequencing

Next Generation of DNA Sequencing.

Overview of DNA Sequencing for automated sequencers.

3130 DNA sequencer

DNA cycle sequencing.

Animation (to view, click play for the cycle sequencing animation.)

SOLiD System - Next-Generation Sequencing!

Sequencing primers

Many sequencing primers are commercially available for T7, Sp6, T3, M13 Forward and M13 Reverse recognition sites.

Chemical synthesis of DNA primer.

 

Analyzing DNA sequencing results

DNA eletropherogram

http://www.ocf.berkeley.edu/~edy/genome/sequencing.html

Look at even spacing.

Compressions usually result from repeated homopolymers of C and Gs that are forming secondary structure.

Can use dITP instead of dGTP to interupt secondary structure formation.

In diploid organisms, single nucleotide polymorphisms (snps) can be observed.

 

Maxam - Gilbert Direct chemical Sequencing of labeled, single-stranded DNA

Chemical sequencing

Strand separation gel

C reaction for chemical sequencing

G reaction steps in chemical sequencing

Maxam-Gilbert sequencing gel

 

Direct chemical sequencing of labeled RNA

Chemical RNA sequencing

 

Direct enzymatic sequencing of labeled RNA

Enzyme RNA sequencing

Enzyme RNA sequencing gel

 

 

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