name: type III site-specific deoxyribonuclease complex
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def: "A heterodimeric enzyme complex composed of two subunits, Res and Mod, that functions as an endonuclease and cleaves DNA. Cleavage will only occur when there are two un-methylated copies of a specific recognition site in an inverse orientation on the DNA. Cleavage occurs at a specific distance away from one of the recognition sites. The Mod subunit can act alone as a methyltansferase. DNA restriction systems such as this are used by bacteria to defend against phage and other foreign DNA that may enter a cell." [PMID:12654995]
synonym: "type III restriction enzyme complex" EXACT 
is_a: GO:1905347 ! endodeoxyribonuclease complex
relationship: part_of: GO:0005737 ! cytoplasm
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