title: Studies on carcinogen chromatin--DNA interaction: inhibition of N-methyl-N-nitrosourea-induced methylation of chromatin--DNA by spermine and distamycin A.
mesh_terms: D000818:Animals; D002843:Chromatin; D004247:DNA; D004214:Distamycins; D008099:Liver; D008297:Male; D008745:Methylation; D008770:Methylnitrosourea; D009607:Nitrosourea Compounds; D011758:Pyrroles; D051381:Rats; D013096:Spermine
chemical_list: D002843:Chromatin; D004214:Distamycins; D009607:Nitrosourea Compounds; D011758:Pyrroles; D013096:Spermine; D008770:Methylnitrosourea; D004247:DNA