Protocol to request
            
                Trichostatin A (TSA) gradient experiment
                
                
            
        
        
            
                Research article
            
            
                Noncoding RNA-nucleated heterochromatin spreading is intrinsically labile and requires accessory elements for epigenetic stability
                
            
            
            
                R A Greenstein et al.
            
            
                DOI: 10.7554/eLife.32948