Peptide-polyphenol tannin

Kalyanaraman B, Premovic PI, Sealy RC (1987) Semiquinone anion radicals from addition of amino acids, peptides, and proteins to quinones derived from oxidation of catechols and catecholamines. An ESR spin stabilization smdy. J Biol Chem 262 11080-11087 Haslam E (1979) Vegetable tannins. Recent Adv Phytochem 12 475-523 Bear JE, Lilley TH, Haslam E (1985) Plant polyphenols - secondary metabolism and chemical defence some observations. Phytochemistry 24 33-38... 

Wort Hydrosoluble material derived from the mashing of barley malt and brewing adjuncts rich in fermentable carbohydrates, dextrins, and other soluble compounds (amino acids, peptides, B vitamins, etc.). The beer wort also contains soluble compounds extracted from hops including polyphenols, humulones, lupu-lones, resins, and tannins. The wort, upon fermentation, yields beer. 

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