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Chapter 5 Sequence Assembly: Assembling the Human Genome.

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Presentation on theme: "Chapter 5 Sequence Assembly: Assembling the Human Genome."— Presentation transcript:

1 Chapter 5 Sequence Assembly: Assembling the Human Genome

2 Figure 5.1: The 23 sets of chromosomes in the human genome Courtesy of National Cancer Institute

3 Figure 5.2: (A) A normal deoxycytosine nucleotide used in DNA synthesis, and (B) a dideoxycytosine that would cause chain termination

4 Figure 5.3: A dideoxy sequencing reaction

5 Figure 5.4: Primer walking or directed sequencing of a genomic insert in a BAC vector

6 Figure 5.5: Shotgun sequencing

7 Figure 5.6: A DNA trace and computer-called base sequence: typical output from an automated sequencing run

8 Figure 5.7: Sample output from the CAP assembler

9 Figure 5.8: Assembly of overlapping DNA sequence fragments into a contig, showing how coverage can allow error correction

10 Figure 5.9: Schematic illustration of the sequence assembly and validation process

11 Figure 5.10: Graph of coverage values for each base position in a DNA sequence, with consecutive, high values indicating the possible misassembly of a repeated region

12 Figure 5.11: Graph representing overlaps between fragments as paths between nodes

13 Figure 5.12: Steps in finding a path to a sequence alignment


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