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Hydrolase
enzymes that catalyze a hydrolytic cleavage reaction
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Nuclease
Breaks down nucleic acids by hydrolyzing bonds between nucleotides
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Protease
Breaks down proteins by hydrolyzing peptide bonds between amino acids
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Ligase
- Joins two molecules together
- DNA ligase joins two DNA strands together end-to-end
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Isomerase
Catalyzes the rearrangement of bonds within a single molecule
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Polymerase
Catalyzes polymerization reactions such as the synthesis of DNA and RNA
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Kinase
- Catalyzes the addition of phosphate groups to molecules
- Protein kinases are an important groups of kinases that attach phosphate groups to proteins
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Phosphatase
Catalyzes the hydrolytic removal of a phosphate group from a molecule
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Oxido-reductase
- General name for the enzymes that catalyze reactions in which one molecule is oxidized while the other is reduced
- Enzymes of this type are often called oxidases, reductases, or dehydrogenases
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ATPase
- Hydrolyzes ATP
- Many protains have an energy-harnessing ATPase activity as part of their function, including motore proteins such as myosin and membrane transport proteins such as the sodium pump
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