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Lecture 6

Biochemistry 2EE3 Lecture 6.docx

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Department
Biochemistry
Course
BIOCHEM 2EE3
Professor
Karen Mc Garry
Semester
Winter

Description
Biochemistry 2EE3 Lecture 6 • • There are 3 billion base pairs in our genome • There is one metre of DNAin a cell • • This is a bacteriophage microphotograph • Diameter of DNAis usually ~15A, which electron microscopes cannot see, therefore the DNAis fattened with cytochrome • Twenty-three chromosomes with three billion base pairs • • • • Diagram shows a DNAmolecule which weaves around histones • Histones pack together to form filaments • There is a lot of space • This is necessary for protein to find gene, attach to DNA, etc (?) •
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