title: Erratum.
abstract: In the report "Site-specific nick in the T-DNA border sequence as a result of Agrobacterium vir gene expression" by K. Wang et al. (30 Jan., p. 587), figure 2A on page 588 should have shown a 3.2-kilobase band in lane b that was not visible. Also, 1.9-kilobase bands in lane c and g were not visible. A Print that shows the bands in figure 2, A and B, appears below. In addition, reference 24 should have been to J. L. Slightom, L. Jouanin, F. Leach, R. F. Drong, D. Tepfer, EMBO J. 4, 3069 (1985). [See Table A and B in Source PDF].