Volume 24, no. 22, p. 9920-9929, 2004. Page 9927, Fig. 5C: The Δ label should read “+, neo.”
Page 9927, Fig. 5 legend, lines 7 to 9: should read “cultured outgrowths. The left gel shows that the floxed Mgat1F allele (F) had been deleted in each embryo and that each embryo carried an Mgat1neo (neo) or Mgat1+ (+) allele, detected with primers PS585 and PS586 (Fig. 1). The right gel shows whether a mutant egg was fertilized by an Mgat1+ or Mgat1neo sperm, detected with primers PS91, PS92, and PS93 (Fig. 1).”