Abstract: The binding of gallotannins(β-1,2,6-tri -O -galloyl -D -glucose TGGandβ-1,2,3,4,6-penta -O -galloyl -D -glucose PGG)on typical proteins,phospholipids and sugars was examined quantitativ e-ly.The results indicated that gallo tannins bound more on proteins(histone,bovine serumalbumin,case inand gelatin)andphospholipids(L -α-lecithin,L -α-cephalin andSphingomyelin)than onsugars,andthat PGGhadstron ger binding affinity on proteins,phosp holipids and sugars than TGG.It also showed that protein -gallotannin an d phos-pholipid -gallotannininteactions were the results of cooperative effe cts of hydrogen and hydrophobic bond s,and that hydrogenbond was the predominant effect in the interactions betweengallotannins andsugars.

Key words: Gallotannins , Biomass , Binding , Antin utritional effects