title: The anatomy of direct repair.
mesh_terms: D003503:Cyclobutanes; D004260:DNA Repair; D004255:Deoxyribodipyrimidine Photo-Lyase; D010777:Photochemistry; D011118:Polynucleotide Ligases; D011743:Pyrimidines / Q000528:radiation effects; D014466:Ultraviolet Rays
chemical_list: D003503:Cyclobutanes; D011743:Pyrimidines; D004255:Deoxyribodipyrimidine Photo-Lyase; D011118:Polynucleotide Ligases