- Nucleotide sequence of the AAD(2'') aminoglycoside adenylyltransferase determinant aadB. Evolutionary relationship of this region with those surrounding aadA in R538-1 and dhfrII in R388. Cameron, F.H., Groot Obbink, D.J., Ackerman, V.P., Hall, R.M. Nucleic Acids Res. (1986)