Protocol to request
            
                Metaphase spreads and interphase nuclei
                
                
            
        
        
            
                Research article
            
            
                Oncogene expression from extrachromosomal DNA is driven by copy number amplification and does not require spatial clustering in glioblastoma stem cells
                
            
            
            
                Karin Purshouse et al.
            
            
                DOI: 10.7554/eLife.80207