| 单词 | Dimer,Thymine-Thymine Cyclobutane | 
| 释义 | Dimer,Thymine-Thymine Cyclobutane《英文msh词典》Dimer,Thymine-Thymine Cyclobutane [入口词] Dimer,Thymine-Thymine Cyclobutane [主题词] Pyrimidine Dimers [英文释义] Dimers found in DNA chains damaged by ULTRAVIOLET RAYS. They consist of two adjacent PYRIMIDINE NUCLEOTIDES,usually THYMINE nucleotides,in which the pyrimidine residues are covalently joined by a cyclobutane ring. These dimers block DNA REPLICATION. | 
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