Correction for vol. 277, p. 423
===============================


Gondi N. Kumar, A. David Rodrigues, Alexander M. Buko and Jon F. Denissen: Cytochrome P450-Mediated Metabolism of the HIV-1 Protease Inhibitor Ritonavir (ABT-538) in Human Liver Microsomes, JPET Vol.**277**(1)**:** 423–431, 1996.

The authors regret that figure 1 did not correctly show some fragment ions of metabolites M-2 and M-11 as sodium adducts. This error does not affect either the interpretation of the mass spectral data or structural identification. The corrected figure is provided below.

![Figure 1](http://jpet.aspetjournals.org/http://jpet.aspetjournals.org/content/jpet/281/3/1506/F1.medium.gif)

[Figure 1](http://jpet.aspetjournals.org/content/281/3/1506/F1)

Figure 1 
Structures and mass spectral fragmentation patterns of ritonavir and its human liver microsomal metabolites. *,14C label.

*   The American Society for Pharmacology and Experimental Therapeutics