Genetics. In the article “Identification of genes induced by factor deprivation in hematopoietic cells undergoing apoptosis using gene-trap mutagenesis and site-specific recombination” by Andreas P. Russ, Christina Friedel, Karin Ballas, Uwe Kalina, Dirk Zahn, Klaus Strebhardt, and Harald von Melchner, which appeared in number 26, December 24, 1996, of Proc. Natl. Acad. Sci. USA (93, 15279–15284), an incorrect version of Fig. 5 was printed that is missing lane labels and M_r markers due to a printer’s error. The figure and its legend are shown below.

Figure 5.

Analysis of cell-provirus fusion transcripts in clones recovered after IL-3 withdrawal. (Upper) Predicted transcripts from U3Cre integrations into expressed genes. (Lower) Northern blot anaylsis of cell-provirus fusion transcripts before and after serum deprivation. Polyadenylated RNAs (5 μg per lane) were fractionated on formaldehyde-agarose gels, blotted onto nylon filters, and hybridized to ³²P-labeled Cre- or glyceraldehyde-3-phosphate dehydrogenase (GAPDH)-specific probes before (odd number lanes) and after (even number lanes) 16 hr of serum deprivation. Lanes 5 and 6, clone with a constitutively expressed U3Cre integration. Note that exposure times for visualizing Cre-specific transcripts were 145 times longer than those required for GAPDH.