ate ▁is ▁bound ▁to ▁the ▁en zym e , ▁the ▁active ▁site ▁of ▁the ▁en zym e ▁is ▁blocked ; ▁therefore ▁ph osph or ol ysis ▁of ▁G 3 P ▁is ▁unable ▁to ▁occur . ▁High ▁concentr ations ▁of ▁t et rose ▁di ph osph ate ▁must ▁be ▁used ▁to ▁out comp ete ▁the ▁substr ate , ▁G 3 P , ▁and ▁block ▁the ▁function ▁of ▁G 3 P ▁de h ydro gen ase . ▁With ▁the ▁function ▁of ▁g ly cer al de hy de ▁ 3 - ph osph ate ▁de h ydro gen ase ▁lost , ▁g ly col ysis ▁cannot ▁proceed . ▁ ▁D - ery th rose ▁ 4 - ph osph ate ▁was ▁found ▁to ▁be ▁an ▁in hib itor ▁of ▁ph osph og l uc ose ▁is omer ase . ▁Ph osph og l uc ose ▁is omer ase ▁is ▁the ▁second ▁en zym e ▁in ▁the ▁g ly col ysis ▁path way , ▁and ▁its ▁role ▁is ▁to ▁convert ▁gl uc ose ▁ 6 - ph osph ate ▁into ▁f ruct ose ▁ 6 - ph osph ate . ▁ ▁In ▁both ▁of ▁these ▁cases , ▁the ▁t et rose ▁is ▁an ▁in hib itor ▁of ▁an ▁en zym e ▁in ▁the ▁g ly col ysis ▁path way , ▁prevent ing ▁it ▁from ▁proceed ing ▁on ward . ▁ ▁References <0x0A> </s> ▁The ▁Ca ith ness ▁Am ateur ▁Football ▁Association ▁( CA FA ) ▁is ▁a ▁football ▁( s occer ) ▁league ▁competition ▁for ▁amateur