ID 3.1.21.9 DE T4 deoxyribonuclease IV. AN T4 endonuclease IV. CA Endonucleolytic cleavage of the 5' phosphodiester bond of deoxycytidine CA in single-stranded DNA. CC -!- This phage T4 enzyme is involved in degradation of host DNA. CC -!- The enzyme does not cleave double-stranded DNA or native T4 DNA, CC which contains 5-hydroxymethylcytosine instead of cytosine. DR P39250, END4_BPT4 ; //