cyclobutane pyrimidine dimers造句

• The tanning activator coumarin is known to induce thymine dimers ( cyclobutane pyrimidine dimers ).
• These mutations arise due to chemical changes, the formation of cyclobutane pyrimidine dimers and photoproducts formed between adjacent pyrimidine bases.
• This complex functions in nucleotide excision repair, recognising UV-induced ( 6-4 ) pyrimidine-pyrimidone photoproducts and cyclobutane pyrimidine dimers.
• XP has been classified into eight complementation groups, XP-A to XP-G and XP-V . Cells from XP-A to XP-G patients have defects in the process of nucleotide excision repair ( NER ), which eliminates a wide variety of structurally unrelated lesions, including ultraviolet light ( UV )-induced cyclobutane pyrimidine dimers ( CPD ) and ( 6-4 ) photoproducts, as well as certain chemical adducts.
• The branch named Cryptochrome-Drosophila, Arabidopsis, Synechocystis, Human ( Cry-DASH ) were previously assumed to have no DNA repair activity because of negligible activity on double-stranded DNA . The study published by A . Sancar and P . Selby provided evidence to suggest this branch of cryptochromes have photolyase activity with a high degree of specificity for cyclobutane pyrimidine dimers in single-stranded DNA . Their study showed that VcCry1 from " Vibrio cholerae ", X1Cry from " Xenopus laevis ", and AtCry3 from " Arabidopsis thaliana " all had photolyase activity on UV irradiated ssDNA in vitro.