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The Electronic Protocol Book Table of contents BioToolKit 300 Download Trials
     An electronic protocol book with 500 protocols and 100 recipes. A great quick and practical reference for bench scientists as well as for new students.   Get A Copy      A collection of tools frequently used by bench biomedical scientists, ranging from centrifugation force conversion, molecular weight, OD, recipe calculators, to clinical calculators. Include all Primo 3.4, Abie 3.0, Heatmap Viewer, MicroHelper, Godlist Manager, label printing, and grade book.   More info

Molecular Biology Glossary  A-Z A B C D E F G H I J K L M N O P Q R S T U V W X Y Z

5' end or 3' end

5' end or 3' endRefers to the two ends of a DNA or RNA molecule. The 5 prime end has a free hydroxyl (or phosphate) on a 5' carbon and the 3 prime end has a free hydroxyl (or phosphate) on a 3' carbon. The numbers refer to the carbon atoms in the sugar ring of a nucleic acid.
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