Example sentences for: cytosine

How can you use “cytosine” in a sentence? Here are some example sentences to help you improve your vocabulary:

  • Several gene family members, including Cpn 008, 010, 043, 1054, and 1055, contain homopolymeric cytosine repeats either upstream or at the predicted 5' end of the coding region.

  • Removal of negative supercoils from DNA by bacterial type IA topoisomerase involves the following steps: (1) binding of the enzyme to the junction of double-stranded and single-stranded DNA [ 8 ] ; (2) cleavage of a single-strand of DNA near the junction with cleavage sequence preference of a cytosine in the -4 position to form the covalent intermediate [ 9 10 ] ; (3) conformational change of the covalent enzyme-DNA complex to result in physical separation of the 5' phosphate covalently linked to the active tyrosine, and the 3' hydroxyl of the cleaved DNA; (4) passage of the complementary single strand through the break; (5) enzyme conformational change to bring the 5' phosphoryl end back into the proximity of the 3' hydroxyl group of the cleaved DNA; (6) religation of the phosphodiester bond.

  • Epigenetic hypermethylation in the promoter regions of a number of genes has been recognized as an important change in the development of human cancer [ 9 ] . A growing number of cancer-related genes have been identified to harbor methylation of cytosine residues in CpG-rich promoter sequences.

  • MeCP2's functional structure consists of an 84 amino acid methyl-binding domain (MBD) [ 11 ] and a 104 amino acid transcriptional repression domain (TRD) [ 12 ] . The MBD is able to bind to 5-methyl cytosine residues of a single CpG dinucleotide [ 11 ] . Under the current model, MeCP2 binds to DNA, then complexes with Sin3A through the TRD and recruits histone deacetylases (HDAC).

  • Intermolecular interactions can be precisely predicted by Watson–Crick basepairing (adenine to thymidine and guanine to cytosine).


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