Text this: Naturally occurring substitutions of conserved residues in human immunodeficiency virus type 1 variants of different clades are involved in PG9 and PG16 resistance to neutralization

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