Enzymes  and  Enzyme  Kinetics  I Dr.  Kevin  Ahern Enzymatic  Reactions Enzymatic  Reactions Enzymatically  Catalyzed  Reactions • Background Substrates Bound at Active Site of the Methylene Tetrahydrofolate Reductase Enzyme Enzymatically  Catalyzed  Reactions • Background • Enzyme Substrates Bound at Active Site of the Methylene Tetrahydrofolate Reductase Enzyme Substrates Enzymatically  Catalyzed  Reactions • Background • Enzyme • Substrate(s) Substrates Bound at Active Site of the Methylene Tetrahydrofolate Reductase Enzyme Enzymatically  Catalyzed  Reactions • Background • Enzyme • Substrate(s) Substrates Bound at Active Site of the Methylene Tetrahydrofolate Reductase Enzyme Enzymatically  Catalyzed  Reactions • Background • Enzyme • Substrate(s) Substrates Bound at Active Site of the Methylene Tetrahydrofolate Reductase Enzyme Enzymatically  Catalyzed  Reactions • Background • Enzyme • Substrate(s) Substrates Bound at Active Site of the Methylene Tetrahydrofolate Reductase Enzyme Enzymatically  Catalyzed  Reactions • Background • Enzyme • Substrate(s) • Active  Site Active Site Substrates Bound at Active Site of the Methylene Tetrahydrofolate Reductase Enzyme