Erratum.

Abstract

Structure of HIV-1 TAR RNA in the absence of ligands reveals a novel conformation of the trinucleotide bulge F. Aboul-ela J. Karn and G. Varani Nucleic Acids Res. (1996) 24, 3974-3981 The publishers wish to apologise for printing Figure 3 of the above paper upside down, as compared with the description in the figure legend. The correct oriented Figure 3 , with its legend, is reprinted below. Please note that this figure also appeared on the cover of Nucleic Acids Research volume 24, issue 20, therefore the legend that is supplied with that cover should only be considered as correct when the cover figure is rotated through 180°. Figure 3Major groove view of the free TAR RNA (left) and bound TAR RNA (right) structures. These are representative structures with low violations of experimental constraints. Functional groups which have been identified as critical for Tat binding, including the backbone phosphates, are highlighted by van der Waals spheres. These include; phosphates: 21-22, 22-23, 39-40 and 40-41, U23 HI and 04, G26 and A27 N7. A22 and A27 are highlighted in purple, U23 in green and G26 in yellow.