One of these enzymes bound and cleaved the epsilon A-containing deoxyoligonucleotide.

One additional unexpected fact was that bulk p-BQ-treated salmon sperm DNA did compete effectively with the epsilon A-containing oligonucleotide for protein binding.

Both epsilon A and epsilon C were excised at similar rates, while 1,N2-epsilon G and N2,3-epsilon G were released much more slowly under identical conditions.

The probe used for characterization was a 25-base oligonucleotide containing a single site-specifically placed 1,N6-ethenoadenine ( epsilon A), a product of vinyl chloride metabolism.