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Fig. 4 BAC modification process. (A) The UCSC genome browser showing two BACs (red arrows) spanning the gene nkx3.2 in zebrafish. (B) BAC modification by homologous recombination to insert a reporter gene and a drug selection cassette next to the translation start site of the gene (ATG). (C) A zebrafish carrying the modified BAC for the gene nkx3.2 expressing EGFP in sclerotomes (white arrows) at 24 hpf. Abbreviations: EGFP, enhanced green fluorescent protein; NEO, neomycin; LHA, left homology arm; RHA, right homology arm; TGA, stop codon.
                
                    
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                        Acknowledgments
                    
                    
                
                
            
        
        
    
        
            
            
                
                    
                        
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      Full text @ BMC Dev. Biol.