- 
        Signature
      
 
      - 
        /s/ Mina Kim, Attorney-in-fact
      
 
    
    
      
- 
        Stock symbol
      
 
      - 
        SLRN
      
 
    
    
      
- 
        Transactions as of
      
 
      - 
        Aug 2, 2023
      
 
    
    
      
- 
        Transactions value $
      
 
      - 
        $0
      
 
    
    
      
- 
        Form type
      
 
      - 
        3
      
 
    
    
      
- 
        Date filed
      
 
      - 
        8/3/2023, 08:08 PM
      
 
    
    
    
    
   
     
   
 
  
    Transactions Table
  
  
    
      
        
          | Type | 
          Sym | 
          Class | 
          Transaction | 
          Value $ | 
          Shares | 
          Change % | 
          * Price $ | 
          Shares After | 
          Date | 
          Ownership | 
          Footnotes | 
        
      
      
          
            | holding | 
            SLRN | 
            Common Stock | 
             | 
             | 
             | 
             | 
             | 
            6.25K | 
            Aug 2, 2023 | 
            Direct | 
             | 
          
      
    
   
  
    * An asterisk sign (*) next to the price indicates that the price is likely invalid.
  
  
    Remarks:
  
  Exhibit 24 - Power of Attorney