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A wide variety of deoxyribonucleases are known and fall into one of two families (DNase I or DNase II), which differ in their substrate specificities, chemical mechanisms, and biological functions. Laboratory applications of DNase include purifying proteins when extracted from prokaryotic organisms.
Deoxyribonuclease I (usually called DNase I), is an endonuclease of the DNase family coded by the human gene DNASE1. [5] DNase I is a nuclease that cleaves DNA preferentially at phosphodiester linkages adjacent to a pyrimidine nucleotide, yielding 5'-phosphate-terminated polynucleotides with a free hydroxyl group on position 3', on average producing tetranucleotides.
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Exodeoxyribonucleases are both exonucleases and deoxyribonucleases. They catalyze digestion of the ends of linear DNA. They are a type of esterase.
The following is a partial list of the "D" codes for Medical Subject Headings (MeSH), as defined by the United States National Library of Medicine (NLM).. This list continues the information at List of MeSH codes (D06).
Exodeoxyribonuclease I (EC 3.1.11.1, Escherichia coli exonuclease I, E. coli exonuclease I, exonuclease I) is an enzyme [1] [2] [3] that catalyses the following chemical reaction:
The NCBI Bookshelf [6] is a collection of freely accessible, downloadable, online versions of selected biomedical books. The Bookshelf covers a wide range of topics including molecular biology , biochemistry , cell biology , genetics , microbiology , disease states from a molecular and cellular point of view, research methods, and virology .