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Unformatted text preview: direction (e.g. the 'ascending strand') and the others are heading the other (e.g. the 'descending strand'). For reasons of chemical nomenclature, the asymmetric termini of each strand are called the 5' and 3' ends (pronounced "five prime" and "three prime"). Nucleotide sequences are read by enzymes in the "5' to 3' direction". In a vertically oriented double helix, the 3' strand is said to be ascending while the 5' strand is said to be descending...
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This note was uploaded on 09/06/2011 for the course BIO 201 taught by Professor Mr.bajom during the Spring '09 term at Abu Dhabi University.
- Spring '09