title: AP sites and AP endonucleases.
abstract: The sensitivity of internal and terminal apurinic/apyrimidinic (AP) sites to alkaline hydrolysis and beta-elimination is described. The symmetric and asymmetric modes of endonucleolytic hydrolysis by specific AP endonucleases are compared and the discrimination between their non-enzymatic and catalytic mechanism is discussed.
mesh_terms: D001080:Apurinic Acid; D043603:DNA-(Apurinic or Apyrimidinic Site) Lyase; D043223:Deoxyribonuclease IV (Phage T4-Induced); D004706:Endodeoxyribonucleases / Q000378:metabolism*; D011740:Pyrimidine Dimers; D013379:Substrate Specificity
chemical_list: D011740:Pyrimidine Dimers; D001080:Apurinic Acid; D004706:Endodeoxyribonucleases; D043223:Deoxyribonuclease IV (Phage T4-Induced); D043603:DNA-(Apurinic or Apyrimidinic Site) Lyase