發送短信 : Branched polyethylene glycol for protein precipitation

 _    _      ___      _____      ___      ____    
| || | ||   / _ \\   /  ___||   / _ \\   |  _ \\  
| || | ||  / //\ \\ | // __    | / \ ||  | |_| || 
| \\_/ || |  ___  ||| \\_\ ||  | \_/ ||  | .  //  
 \____//  |_||  |_|| \____//    \___//   |_|\_\\  
  `---`   `-`   `-`   `---`     `---`    `-` --`