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 3.1.-.- :  Acting on ester bonds. 
 3.1.26.- :   Endoribonucleases producing 5'-phosphomonoesters. 
 3.1.26.4 : Ribonuclease H.  
 
 Related Enzymes 
 There are 7 entries in this class. 
 D00158 :  Ribonuclease H (Catalytic domain; 3.40.50.1010)
 D00471 :  Gag-Pol polyprotein (Catalytic domain; 2.40.70.10)
 M00135 :  Gag-Pol polyprotein (Catalytic domains; 3.30.70.270, 3.30.420.10)
 M00146 :  Pol polyprotein (Catalytic domain; 3.30.420.10)
 M00166 :  Gag-Pol polyprotein (Catalytic domains; 2.40.70.10, 3.30.70.270, 3.30.420.10)
 M00206 :  Pol polyprotein (Catalytic domains; 2.40.70.10, 2.70.40.10)
 T00252 :  Ribonuclease H (Catalytic domain; 3.30.420.10)
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