@Article{IPB-2236,
author = {Strack, D. and Schliemann, W.},
title = {{Bifunctional Polyphenol Oxidases: Novel Functions in Plant Pigment Biosynthesis}},
year = {2001},
pages = {3791-3794},
journal = {Angew. Chem. Int. Ed.},
doi = {10.1002/1521-3773(20011015)40:20<3791::AID-ANIE3791>3.0.CO;2-T},
volume = {40},
abstract = {Enzymes in search of a function, for polyphenol oxidases (PPOs), described as such, this situation has changed recently. A tyrosinase is involved in betacyanin biosynthesis in common portulaca (see picture) and red beet, and a chalcone‐specific PPO is responsible for the formation of aurones in yellow snapdragon flowers.}    
}