Takasugi M. ea, 1991
Takasugi M. , Guendouz A. , Chassignol M. , Decout J.L. ,
Lhomme J. , Thuong N.T. , Helene C. Sequence-specific photo-
induced cross-linking of the two strands of double-helical DNA
by a psoralen covalently linked to a triple helix-forming
oligonucleotide. Proc. Natl. Acad. Sci. USA , *88,
5602-5606, ( 1991 ).