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

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Text this: Biosynthetic mechanism of antitumor enediyne natural products.