a dna oligomer 25 nucleotides long which contained an hmt ( 4'-hydroxymethyl-4,5 ' , 8-trimethylpsoralen ) furan side monoadduct to thymidine at a 5'-tpa-3 ' site was used as a probe for the polylinker sequence present in single-stranded m13 mp19 dna and in double-stranded puc 19 dna .
C0012935
single-stranded
C0012854
double-stranded