the ultimate carcinogenic metabolites may be influenced in their ability to react with dna by a number of factors such as internal levels of detoxifying enzymes , the presence of other metabolic intermediates such as glutathione with which they could react either enzymatically or non-enzymatically , and the state of dna which is probably most heavily influenced by whether or not the cell is undergoing replication or particular sequences being expressed .
C0012854
dna
C0598312
replication